When engaging in anal sex and you take your thang out of your girl's butt and draw a charicature on her ass with it, this is known as performing a rolf harris.
Dude, last night I was shaggin' my mates bird when I rolf harris'd his face on her sweet cheeks.
(n.)The miniature orgasm one experiences after urination.
Often accompanied by a short tremor or shaking.
Typically, barfunkels procede extremely volumous urination.
Highly common among individuals experiencing alcohol intoxication.