Top Definition
Indulging ones hunger by eating everything in sight; particularly relating to heavy foods containing massive amounts of oil and sugar.
Like oh my god my diet starts tomorrow I'm definitely going to tub up tonight.

Look at that girl eat, she's totally tubbing up right now at KFC.
by the tardy threesome December 26, 2010
Overindulging to the point of discomfort.

TTUT: Totally Tubbing Up Tonight
TMT: Too Much Tubbing
It's Valentine's Day and I'm single, time to tub up!
by Luscious Candy February 14, 2011
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