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!
po IMW Април 5, 2008
derived from the singer Ville Valo due to his curly hair and hat.A flopsy is always male and often has an arched back.
po pokie_orna Децембар 18, 2003
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."
po Mcdrizzle Фабруар 13, 2010