Not for the faint of heart. When one roommate openly wrongs another in a irreversible fashion, the victimized roommate is then entitled to cause severe emotional and physical stress by slapping his roommate at an unruly time in the wee hours when he is sleeping. Note* the roommate doing the slapping is to do his best to make the other extremely paranoid, vulnerable, and scared to the point where his roommate will not get to sleep for an extended period of time. The person receiving the slapping may cuss, threaten, and even plea with his tormentor and would-be assailant to avoid the malicious attack. However, these wheelings and dealings must fall on deaf ears, as the aggressor mercilessly makes good on his the threat.

The phrase derives its name from the sound the roommate makes as he sneaks his way across the room to the bed of his unsuspecting pal.
You shouldn't have slept with my mom, now I'm going to give you The Late-Night Pitter-Patter of your life.
by Spencer Hills 101 September 4, 2009
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8. oktober.
En dag om året, hvor man har tilladelse og næsten er forpligtet til at gramse på bryster uden samtykke.
-Tog du lige på mine bryster!?
-Ja, det er national Gramse-Patter-Dag.
-Undskyld, bare fortsæt.
by Screw_JayDuck October 21, 2020
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Used to discribe someone who cant find something they just had. Usually resulting in the person turning around in circles and patting their pockets over and over.
i cant find my wallet and now ive become a circle pattern pants patter
by The Feelgoods January 9, 2018
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A derogitory comment towards the quality of another persons patter. Refers to the unremarkable, see-through, thin and tastesless aspects of a persons patter. Scottish in origin.
"Dude, you're boring the baws aff e me. Your patter's like water."
by Jack McFarlane April 27, 2007
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Patter is wit we call banter no fucking pissin on yer head teacher
by Mr McLightswitch May 17, 2022
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Let’s get at er’ 🤠
Wayne: “Pitter Patter…
-Let’s get at her!”
by PetitePsychic April 22, 2022
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