Citations:blep

Verb: "(Internet slang, of an animal) to extend the tongue beyond the lips without opening the mouth fully"

 * 2017, Cora Contrabida, "Breaking Bills", The Crusader (Xavier University – Ateneo de Cagayan), 1 August 2017, page 19:
 * He had me at the blepping doggo bobble heads on the windshield, which even thawed my ice-cold heart in a way that the Cagayan de Oro heat never can.
 * 2018, Ellen Scott, "Why cats leave their tongues hanging out", Metro (UK), 17 March 2018:
 * You know what blepping is, right? It’s when an animal’s tongue casually pokes out of their mouth and stays there. It’s very cute, but quite odd.
 * 2018, Michele Debczak, "Sploot 101: 12 Animal Slang Words Every Pet Parent Should Know", Mental Floss, 24 May 2018:
 * Animal experts aren’t entirely sure why pets blep, but in cats it may have something to do with the Flehmen response, in which they use their tongues to “smell” the air.
 * 2019, Andrew Fortin-Caldera, "LA Zoo Urges Support for Endangered Species with Cute Animal Pics", NBC Los Angeles, 11 October 2019:
 * The Endangered Species Act is our greatest safeguard against extinction, and it's under attack right now. Animals can’t speak up to protect their own kind, but they can blep.

Noun: "(Internet slang, of an animal) the act of extending the tongue beyond the lips without opening the mouth fully"

 * 2015, "Digital Mews", The Cat Magazine, Winter 2015, page 9:
 * We found out why cats do this and collated some of our favorite blep moments.
 * 2016, Jeremy Moule, "Reddit co-founder: You've got to suck to succeed," CITY Newspaper, 19 October 2016 - 25 October 2016, page 5:
 * The social media site is a sprawling series of discussion boards, ranging from deep debates on sociological theory to pictures of cats with their tongues half out (a “blep”).
 * 2015, Hannah Shaw, Tiny But Mighty: Kitten Lady's Guide to Saving the Most Vulnerable Felines, page 187:
 * She's transformed into a healthy and hilarious cat who loves to chase toys, stick her tongue out (blep!), and cuddle with her mama.
 * 2019, Stephanie Wilson, "Woo-Woo Woofers", Sensi Magazine, December 2019, page 37:
 * Millennials' love for their pups is so intense, it's spawned its own language. Us hoomans chase our heckin floofers, iPhones in hand, snapping pics of their snoots and bleps to share with frens, posting with captions about the goodest boy in the world.