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1.
a question you ask someone right after they tell you to do some you don't agree with, you could just as easily say no or piss off but instead you go all out and ask them do you need a spoon.

it is typically followed by them asking why they would need a spoon, at that time you inform them it to eat your...

eat you ass, shit, piss, ect.
EXAMPLE 1.
boss man: You have to work this weekend.

employee: do you need a spoon?

boss man: why would I need a spoon?

employee: so you can eat my ass.

EXAMPLE 2.
Guy 1: I knew you was wrong about that movie... it sucked

Guy 2: Do you need a spoon?

Guy 1: why?

Guy 2: so you can eat my shit
by B*RAD May 23, 2014