Citations:grumpy pants

Noun: "(countable, informal, sometimes used attributively) a person who is currently in a bad mood or is habitually cranky"

 * 1954, Philip Wylie, The Best of Crunch and Des, Rinehart (1954), page 360:
 * "You fish, pal. Old grumpy-pants doesn't own the ocean!"
 * 1991, Barbara Hall, Dixie Storms, Bantam Starfire (1991), ISBN 9780553290479, page 90:
 * "Don't pay no attention to her," said Bodean. "She's an old grumpy pants."
 * 2003, Cindy Kenney, Jonah: A Worm's Eye View, ZonderKidz (2003), ISBN 9780310704690, unknown page:
 * Jonah did not seem a bit pleased to see me. In fact, he was being a big old grumpy-pants.
 * 2003, Kathy Reichs, Bare Bones, Scribner (2003), ISBN 0743260082, page 205:
 * “There's no need to be a grumpy pants, Detective.”
 * 2004, Anne Ichikawa, "Horoscope", ELLEgirl, June-July 2004, page 58:
 * While your friends are off buying their overpriced mochas, try not to be a grumpy-pants—use this time to transcend such shallow materialistic values.
 * 2006, Alison Wilgus, Sooper Secrets and Boomerang Bloopers, Scholastic (2006), ISBN 9780439829625, unnumbered page:
 * Especially Wally, the big grumpypants!
 * 2009, Leigh Wyndfield, Veiled Heat, Samhain Publishing (2009), ISBN 9781605043654, page 47:
 * Besides, who did he think he was stomping around in a bad mood all the time? Captain Grumpypants.
 * 2010, Eric Alexander, The Summit, New Leaf Press (2011), ISBN 9780892217014, unnumbered page:
 * It wasn't hard climbing and it certainly beat being around old grumpy-pants climbers.
 * 2011, Kathy Reichs, Flash and Bones, Pocket Books (2012), ISBN 9781451675290, unnumbered page:
 * "Petey's being a grumpy-pants about every little thing"
 * 2012, Ellie Daines, Lolly Luck, Anderson Press Limited (2012), ISBN 9781849399234, unnumbered page:
 * I was worried the supply teacher would be some grumpy-pants who liked sending kids out of the room if they dared to interrupt while they were speaking.
 * 2012, Daisy Dunn, Fire's Devotion, Siren Publishing (2012), ISBN 9781619269026, page 30:
 * Now how can I possibly be interested in Mr. Grumpypants when I could have an amazing time with Ethan?
 * 2012, Diana Rowland, Sins of the Demon, DAW (2012), ISBN 9781101563113, unnumbered page:
 * “Okay, grumpypants. Tracy already gave you the gist?”
 * 2012, C. Hendrik Viskil, Uneleven: Academy of Arcane Arts, Llumina Press (2012), ISBN 9781605943756, page 52:
 * “So, Sir Grumpypants, since you've learned to open up, are you going to stop being such a jerk all the time?”
 * 2013, Eve Langlais, B785: Cyborg Romance, self-published (2013), ISBN 9781927459324, page 74:
 * “Charming, there you are. I've been looking all over for you. Grumpy pants here wouldn't tell me where you went.”
 * 2013, G. M. Malliet, Pagan Spring, Thomas Dunne Books (2013), ISBN 9781250021403, unnumbered page:
 * “Melinda, who was leading a dog's life with old grumpypants— the world's greatest writer and actor, to hear him tell it—had in recent months cheered up no end.
 * 2013, MIke Tapscott, Homeless Hero, Abbott Press (2013), ISBN 9781458210647, page 137:
 * “This is the grumpy lady?” I ask.
 * “Yes, grumpypants lady.”

Noun: "(uncountable, informal) a notional pair of pants worn by someone in a bad mood"

 * 2011, C. J. Castano, Forbidden Innocence, Lulu.com (2011), ISBN 9781257321469, page 115:
 * "What is everyone's problem this morning? Did everyone wake up with their grumpy pants on?"
 * 2011, Scott Semegran, The Spectacular Simon Burchwood, Sugar Skull Books (2011), ISBN 9780615758114, unnumbered page:
 * "Well, look who put on his grumpy pants today?" Gina said, punching me in the arm. She was really starting to get on my last goddamn nerves.
 * 2013, Edward Viljoen, The Power of Meditation: An Ancient Technique to Access Your Inner Power, Jeremy P. Tarcher/Penguin (2013), ISBN 9781101601525, unnumbered page:
 * I notice that when I move through the world at this pace, I tend to do what a friend calls “wearing my grumpy pants.”

Adjective: "(informal) cranky"

 * 2013, Kaz Cooke, Mind Your Mental Health: Dealing With Moods, Grief, Depression, Anxiety, Eating Disorders & More, Viking (2013), ISBN 9780857970855, unnumbered page:
 * Meanwhile, others are practically allergic to the idea of a self-help book, or at least very grumpypants about the bad ones