harsh hand job
A variation of the classic hand job in which the woman giving the hand job also spanks/slaps the erect penis in addition to rubbing and stroaking it, often times to keep it hard so the spanking/slapping can continue. The harsh hand job is typically done with the woman sitting between the man's legs or backwards with her buttocks facing the man in an almost "reverse cowgirl" position.
"I got caught going through my girlfriend's roomate's used underwear and in order to keep her from ratting me out I had to submit to a harsh hand job. She kept getting me hard then smacking my dick while scolding me for being a pervert. I never ejaculated so much in my life."