A dirty way of saying surprise butt-sex.
1.Waffles: Hey Dwarfo, I'm gonna cum to your house and knock knock on the back door. If you don't answer, I'm gonna bang bang!

Dwarfo: Yeep! I hope it isn't too surprise!

2. What rapists say to little kids when they are gonna butt-rape them.
by Dr. Dirty October 9, 2008
mugGet the I'm gonna cum to your house and knock knock on the back doormug.
When you are urinating when suddenly you need to violently shit. Then, you stop pissing and turn around, firmly pressing your puckered ass onto the seat and unloading an ungodly amount of assham into that poor, poor toilet.
Larry: "Damn, I thought you were taking a leak!"

Jim: "Yeah, sorry. I had a Knock, Knock Motherfucker moment."

Larry: "A what now?"
by The mystery shitter April 27, 2022
mugGet the Knock, Knock Motherfuckermug.

Knock knock

A term used to make a joke that starts out as someone knocking on the door.
Dingbat: Knock knock.
Scallywag: Who’s there?
Dingbat: Mike.
Scallywag: Mike who?
Dingbat: Oxmaul.
Scallywag: I don’t get it. Mike Oxmaul?
Dingbat: I didn’t know that. HA HA!
by Likewater August 15, 2021
mugGet the Knock knockmug.
the blow-thrower, independent flower magical emerald holder
Average loser: *doesn't repay debts
government: knock knock it's knuckles
by Immortalgodofgaming February 22, 2022
mugGet the knock knock it's knucklesmug.

utility knock-knock joke

Any of several well-known "door-tap pun" verbal exchanges which involve either an offer ("Howard", "Tijuana", etc.) or a request ("Woodrow", "Kudu", etc.) by da speaker to da listener; often, said query is proffered in said manner in an effort to lighten da mood and add a little humor to said proposal, in order to hopefully take some of da sting outta da expressed idea, which might involve less-than-desirable aspects such as difficult/yucky/tedious labor, significant changes in habits/lifestyle such as being more active and/or giving up "comfort" foods, etc.
A lot of da utility knock-knock joke selections are somewhat "interchangeable" as far as their "request" or "offer" status --- i.e., a word dat's mostly intended for proposing an assistive/generosity action by da speaker to da listener (such as "Howard you like me to _?", or "Tijnana do/have _?") can also be used by da speaker for asking for assistance/charity from da listener (such as, "Howard you feel about doing _?", or "Tijuana volunteer to _?"). Or by da same token, a gigglingly-uttered conversing dat uses a word which is usually reserved for giving-of-time/resources appeals can also be used by da speaker to extend an offer of help to da listener, such as, "Woodrow like me to _?", or "Kudu let me help you out by _?"
by QuacksO June 15, 2024
mugGet the utility knock-knock jokemug.

Knock knock

The sudden urge to take a poo
I just finished my coffee and I’m getting a knock knock so I’m gonna head to the bathroom
by Tuono-rider May 19, 2019
mugGet the Knock knockmug.

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