Exaggerated lips on the mouth of beautiful woman which appear to entice a male member.
"She's got a nice set of doorknob-sucking lips, and I wish she'd just 'plant them tulips' on my crank."
by Etch September 8, 2006
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When doing another human being from behind in the Doggy Style, insert both pinkies in each corner of the victims mouth to gain full control and direct them to the nearest doorknob for rapid ingestion.
When Terry started talking about wedding plans during sex, I instantly initiated the Doorknob Double Fishhooks move and forcibly directed Terry over to the bedroom doorknob for a rapid polishing and punishment.
by Banana Horse December 30, 2011
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On September 12th, celebrate this national holiday by sticking your cock in a doorknob
Kevin: bro I got my dick stuck in a doorknob yesterday
Brian: why the fuck was your dick in the doorknob in the first place
Kevin: because bro, it's national fuck a doorknob day
by Doorknobfucker42 April 11, 2018
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A sign indicating that the occupants of the room on the other side of the door are engaged in sexual activity.
Necktie hanging from a doorknob

(Older student): just to make sure, you do know what it means if you see a necktie hanging from the doorknob right?

(Younger student) Yep , it means sit quiet and wait ten minutes or so for you to finish.
by Rakis June 8, 2018
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The Denver Dripping Donkey Doorknob is when a man ejaculates onto a doorknob and waits on the other side until someone opens the door. When the other person walks through the door the man pulls down his pants, bends over. and defecate all over the person's crotch
"Aw man someone totally pulled the Denver Dripping Donkey Doorknob on me. There was cum on my hands and shit all over my penis."
by donkay_fucka June 14, 2009
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