Citations:birthday suiter

Noun: "An unclothed person."

 * 2015, Rachel Simon, "The Magic Touch: A Novel", link
 * In other words (given a yesno proposition instead of the much vaguer What happened), a newly created birthday suiter just might cough up the truth.
 * 2013, Robert Nolin, "Campers displace nudists at Davie resort", Sun-Sentinel, 14 September 2013
 * The Davie camp still boasted its share of birthday suiters when current owner Toma bought it six years ago.