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1. Gubble
The lower, protruding mandible on a canine with an under-bite, evident in such breeds as Bulldogs, Pugs, Boxers and Mastiffs.

"He's got his nubble stuck in his gubble!"

"Put your gubble in..."
2. Gubble
Name given to the "Bubble Shield" item in Halo 3; a combination of "bubble" and "ghey" meant to reflect the rather lame nature of the shield.
"Dude, sniper, look out! Throw down a gubble!"

"Watch out, that bitch is campin' in a gubble with a shotty."
3. gubble
desc or object: like chuff, to be used as expletive or as the description of someone who is ecstatically happy.
how are you doing old gubble
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