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Boy 1: "That girl over there is slutty but shes fat!"
Boy 2: "yeah she's a thubby"
Thubby by HJKKKKTFHPNisiupw June 12, 2019

Throbbysome 

The act of having a sexual threesome involving two women and a man named Bobby.
Bobby said, "Dude, last night I had an un-fucking believable Throbbysome!"
Throbbysome by Maadhatch August 30, 2009
(adj. english, unisex) leaning on the thick fence, not quite in the field of chubby
They were thick in college and have since put on weight, but not enough to be considered chubby, they're thubby.
Thubby by ZEG June 20, 2007

Throbby McFerrin 

That unstoppable bulge in your trousers after listening to a particularly delightful piece of music.
Are you listening to the Sign of the Times remaster? Looks like Throbby McFerrin will be singing back up on every track today.
Shes the type of billi ho that likes trubbys bumbed in her trunk.
Trubby by Andrew March 16, 2004

Thrubbing 

When you have walked after a long time and your fat thighs begin to rub together. rubbing+thighs= thrubbing.
Man, we've been walking for hours,and now i'm thrubbing!
Thrubbing by zepiculs September 14, 2007