Top Definition
when someone is so fat when you pick them up your thumbs disappear in there FUPA
John: when i picked up Mary last night my thumbs disappeared in her FUPA
Frank: so your saying she is thumby ?
John: ya
by frank jack murphy the fouth September 25, 2008
Having freakishly large thumbs with average size hands
Hey Thumby, two freakishly large thumbs up!
by firecracker83 September 22, 2011

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