Top Definition
The sound that is made when you stick out your tongue and spit/blow out air. Like a young child does when they are being bratty.

The word was made to transfer the sound into text for, what other then, texting.

Add more "L"s,"U"s,"B"s, and "T"s for a more prolonged effect.
*Any conversation through text*
Person 1: Hey do you want to hangout after work, I haven't seen you in like 3 weeks?

Person 2: Sorry I can't. I have to wash my parents cars and then do my homework

Person 1: Plluubt
by GIPrice September 22, 2009
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