derived from the singer Ville Valo due to his curly hair and hat.A flopsy is always male and often has an arched back.
di pokie_orna 18 dicembre 2003
When a person (typically a girl) sticks her thumb up man's butthole and flips around his balls between her fingers.
"Ryan just told me that Sarah's flopsy giving abilities are unmatched!
di IMW 05 aprile 2008
When a man and a women are about to have sex, but the man loses his erection when his penis contacts her vagina
"Man I was about to get some last night but I went flopsy."
di Mcdrizzle 13 febbraio 2010