Top Definition
A whole load of jargan or words that are abstract or seem to be compleatly off topic or randomunrellated to the topic at hand.
In forum context.
Topic: Computer games
Someones individual thread: Lunch last night.
Forum members reply: That's just grebble. Back on topic!
by Pyro Teamkill March 11, 2005
1 Word related to grebble

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