The third baseman on Abbot & Costello's baseball team in St. Louis.
Costello: If I mentioned the third baseman's name, who did I say's playing third?
Abbot: No, Who's playing first.
Costello: Stay off of first, will ya? What's the guy's name on third base.
Abbot: No, What is on second.
Costello: I'm not asking you "who's on second?"
Abbot: Who's on first!
Costello: I don't know
Both in unison: THIRD BASE!!!!!!!!!
by pleesedu naht ask May 29, 2006
15 more definitions
Top Definition
What do you think it means? Whats that? You don't know? OH MY GOD! YOU JUST WORKED IT OT!
Why the hell are you reading definitions of "I Don't Know"?

Man... I don't know!
by Pimpage. April 02, 2005
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
A phrase that people use sometimes when they're too lazy to explain anything.
person 1:What did you eat for breakfast?
person 2:I dont know..
by Aretha Woofer Wangs July 10, 2008
what student's always say when they don't study
Teacher: Billy, what do students always say when they don't study?
Billy: I don't know
Teacher: That's right!!!
by maureen lewis April 21, 2004
A statement of confusion and extreme exaustion. Especially appropriate after staying up all night outside of a Krispy Kreme doughnut shop.
"So, why did you camp out for the grand openning?"
"I don't know."
"OK, uhh, are you excited to have a Krispy Kreme in Spokane?"
"I don't know."
by stevie September 15, 2003
the foundation of a relationship
what are you lookin at? i don't know! what were you just talkin about? i don't know!
by leonidas300 August 05, 2007
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 09, 2014

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