When a woman give a boob job to a mans penis and making him ejaculate.
Dude, I got lucky last night, and she was totally milking the back udder, if you know what I mean ;)
It is when a mail (or femile if they have a strap-on) lays there partner on their belly with their butt exposed and jumps in the air and slams their penis into their partners butt
Dude, my gf wanted to do something crazy last night, so I butt nuked her, it was awesome but painful
A quick smack to the vagina with the tips or knuckles of your fingers, much like the nut tap...
"This girl was messing with me, and I didn't want to get my make up messed up, so I vag smacked her"