Similar to Stockholm Syndrom, except it normally happens during prom season. Symptoms are romantic or affectionate feelings for your prom date, caused by friends, prom hype, and a variety of other factors. These feeling can result in kissing, handjobs, blowjobs, or in extreme cases, prom babies. Symptoms of Promhold syndrome disappear within 1-10 days after prom night.
"She totally blew him on prom night. She's normally such a good girl!"
"She probably developed promhold syndrome. Give it a week."