When a man slaps (knocks) the head of his dick on top of the woman's clitoris in order to open the lips (door) to her pussy. Can also be applied to a woman's nose and her mouth.
Dick: Knock, Knock
Pussy: Who's There
Dick: I'm knocking on the door, open up!
Pussy: Cum on in.....
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When you are masturbating and you accidentally hit your testicles with your fist.
Guy 1:"Have you ever knocked on heavens door?"
Guy 2: "Dude, i accidentally went knocking on heavens door last night and i was in pain for hours".
When you risk your life and almost get yourself killed.
Example for "knock on heaven's door"
-Why are you always risking your life? I don't want you to be a hero if it kills you! Do you know how much I worry about you? And still, you just keep knocking on heaven's door!
-I'm sorry mom, but I couldn't let that baby burn alive inside that building when it was on fire. And the mother was screaming outside.
Means to have to defecate or have a bowel movement or to have to take a dump. Mainly used for an emergency situation, where the movement in imminent, but can be used for any announcement of your condition.
Remember that jalepeno burrito I had earlier, with the ice cream sundae and Heinekins for dessert? Well, Mr Hankey is knocking on the door about now!!
I've been sick all day, and I think Mr Hankey is knocking on the door again.
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When in doubt, get off your butt and knock on doors! This is an old saying among detectives, salesmen and politicians.
I told the new guy, get off your butt and knock on doors.
When your dick is so big that the head repeatedly bounces off the cervix during intercourse.
"Yo Leish, remember Tyrone that boi i I had ova last nite!?!
"U kno it girl, wha he do?"
"Gurl his dick so big he be knocking on heaven's door all night kno whA am sayin?"
"Shit guerrrlll"
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The act of going door to door in order to solicit homosexual activities
Matt G could not play video games with his friends, he was out knocking on doors
It gets lonely in the barracks, so Matt G knocks on doors to pass the time.
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