1) Words used to enter or reenter a conversation in which a portion has been missed due to spacing off or physical absence.

2) A method for asking someone to repeat them self.
Person one in the middle of a conversation:
...or it wont work right.

You:
Who do what?

Person one repeating:
The batteries have to go in with the label facing out or it wont work right.
by psychoneuromancer December 11, 2010
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