1. a flaccid testicle that hangs out of the wearer's shorts; 2. a deruagatory term for an unwelcome party guest that becomes the last person at the party.
1. I hate these shorts, my scrotflaps are always hanging out. ; 2. Zack is such a scrotflap sometimes, I wish he would just get the point that we don't want him hangin out for 58 hours in a row.
1: A person who engages in oral sex for money. They also pull on the hairs of the customer while they are performing the act.
A woman is sucking on a mans who-dilly and pulls on the hairs of his little butthole and gives him a weird type of pleasure only he enjoys. This woman is a "Scrotumatthew".