I know it like the back of my ass

phrase.
refers to an unknown area. the opposite of the common phrase "i know it like the back of my hand". Originates from the fact that most people (unless they are porn actors/models) are quite unfamiliar with the backs of their asses.

Joey: oh look that chick lives in Ismay, Montana. I know that place like the back of my hand. I'll get laid for sure!

Tommy: shit, I know it like the back of my ass.
(walks away defeated...)

by RedDan69 February 21, 2011

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i don't know

the three most helpful words in any relationship

who's lipstick is this on your shirt? i dont know.
where were you? you're late! i dont know

by dtownboy December 28, 2002

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I don't know

I don't know; or in other words: I do not give a fuck about what you're asking me.

Mostly used when you don't want to start a conversation with someone.

1. Mom: "What do you want to eat for dinner, son?"
Son: "I don't know, mom."

2. Joe: "How are you doing that?"
Billy: "Dude, I don't know."

**Real Signification**:
1. Mom: "What do you want to eat for dinner, son?"
Son: "Shut up, mom, I'm doing something more interesting than you."

2. Joe: "How are you doing that?"
Billy: "Dude, I don't give a damn about you. Get the fuck out."

by cervul March 26, 2014

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