A form of rape. Action of humping a stranger (wheather female or male) by jumping on them in the most unexpected moment (such as in the streets) and humping him/her untill you get arrested or something. It is very retarded idea to try to do it in public.
Bisexual Rapist:"HUMPING SPREE!!!!!!"
Victim:"WTF!WTF!WTF! U R GAY!"(I know. this is different for all people.)
and the victim shouts some swear words and tries to get the rapist off. Weather the victim succeeds to escape or not matters how strong or heavy the rapist is.