Something that Beck says, usually when being surprised, sort of like "Wha' da' fuh?". Can also be used in the term of questioning, or non-understanding. It can also be used to describe awesomeness.
1.) "Hey, Beck, can I ask you a question real quick?"
"Odelay!"
"Whoa, man, what does that mean?"
"Look it up, jackass."
"Hey, just 'cause I'm a democrat does NOT mean I'm a jackass!"
2.) "...And therefore, the variable X must be the coefficient of Y, which would, logically, then be the answer to our question of what the last number of PI is." Beck's head is on his desk, and he appears to be
drooling softly.
"Mr. Beck, can you tell me what the last number of PI is?" asks the Professor, looking down his glasses.
Beck sits up, looks around, wipes the drool off his mouth, and says "Who da' what now with th' Odelay?!"
"Exactly Mr. Beck! And all this time, I was led to believe you were slumbering...."
"Odelay?"
3.) "Dude, Beck, I just banged three broads! And I left one for you!"
"Odelay."
While recording Beck's 1996 album of the same name, the then-unnamed track 'Lord Only Knows' was written down by the engineer as 'O-Del-Ay' based on his phoenetic understanding of the outro vocal. Beck is ACTUALLY singing "Órale", which is a common Hispanic term meaning:
1. affirmation that something is impressive, exclamatory
2. an agreement with a statement (similar to 'word')
3. alarm, surprise or danger
4. a simple greeting
5. "hurry up"
Beck liked the misspelling, naming the album after it. As such, the word carries a similar exclamatory function to it's Spanish pronunciation.