when you stick a penis (or dildo) up someones ass for your sexual pleasure. this happens a lot with queers. but a man could stick his weiner in a womens ass or a women could stick a dildo up another mans ass. there are endless possibilities
me and your wife were butt fucking last night and thats why theres a white spot in her ass.
To slam your large member deep into the rectum of your girlfriend, vigorously gliding it in and out of her puckered anus over and over and over until you gush a huge glob of your thick ball batter DEEP into her gut. Probably the greatest joy known to man.
Man, I was so horny last night that once i butt fucked Rachel, she was still leaking my semen for 3 hours.
