Sickskier1's definitions
A thumb thats exceedingly wide and short. Like a chode but its a thumb, hence chumb. See Megan Fox's thumbs for an example!!
A: OMG look at her thumb its so wide and short!! Who has thumbs like that??
B: Oh yeah she's got a chumb!!
B: Oh yeah she's got a chumb!!
by Sickskier1 March 6, 2011
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