The art of getting your cock and slapping it on your partners forehead before they wake up. Sometimes done before a blow job but less popular
cock knocking = Oli cock knocked Ben before a BJ, Ben was not amused
knocking chunk is slang for smoking chunk dope out of a pipe
elmo: I been knocking chunk all day baby
most evil type of young women, the kind that will poke holes into condoms, their goal is to get pregnant on purpose so as to trap you into a relationship or to further the relationship into marriage....
that knock trapper poked a hole into his condoms now she is pregnant and trying to force a shotgun marriage
On your own
You've been spending too much time on your noddy knock.
(Or you've been spending too much time on your noddy)
When your girlfriend isn't around, so you decide to have sex with a turtle.
"Did you hear about Dave? He went Shell Knocking since Cathy's out of town!"
When your man hits his teeth off of your teeth when becoming intimate with each other.
Yo man I was knocking teeth with my girl the other night