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A creature from Star Trek that breeds like crazy. Wiped out by the Klingons, but a starship from the future brought one back into its own time, thus restoring the species.
Tribbles are so cute but so prolific.
tribble by Korora November 17, 2003
Related Words

Tribble Effect 

A phenomenon that occurs when in Star Trek Online, someone pets their tribble, and others nearby proceed to follow suit.
I went into a crowded space, and petted my tribble. Nearly everyone else nearby who had a tribble petted theirs, as well. Thus, the Tribble Effect.
Tribble Effect by B33R Train June 10, 2010

tub tribble 

A wad of curly hair found in the bathtub. If left unattended, tub tribbles will multiply asexually. In a very quiet bathroom, you can often hear them make soft cooing sounds. They will frequently grab and cling when handled, but usually they do not bite.
Wow, man. You got a serious tub tribble infestation in that bathroom.
tub tribble by Dan D in Binghamton February 10, 2010

Tribble Factor 

When men wear tank tops and the hairs are poking out like they stuffed a Tribble from Star Trek under each arm.
"Brittany, I hate it when your boyfriend wears a wife-beater because of the Tribble Factor! He needs to cover that shit up!"
Tribble Factor by Jacquelina January 18, 2008

Throbble 

To throbble someone is to play with a females clitoris in a fast motion using either one or two fingers in a repetitive movement.
You know that chick Sophie? I can't wait to throbble her tonight, she loves it!
Throbble by KingThrobbler September 11, 2015
1. PURE EVIL
2. A ball of fluff that procreates rapidly and drains an entire species of resources until they collapse. The species does not notice because the tribbles are "cute."

3. Parasite, abomination
The tribble was taken onboard the ship of unsuspecting idiot Earthlings who figured it was a cute pet. THEY WERE WRONG.
Tribble by Appayipyip42 July 1, 2011