Top Definition
A cellphone that vibrates while in your back pocket.
It was funny when that guy's cell went off during the lecture, it gave him a humbum that startled him.
by putzilein January 10, 2015
1 more definition
A gay male usualy sounds like justin bieber who takes large amounts of cock in his ass,Thus making him a humbum, They usualy scream OHHHH FREEDDD and ride pink bikes on christmas wearing tutus and getting fucked in the ass in a semi truck,
Gay fag: Hey sexy why dont you call me humbum in that semi

Guy: Oh hell nah bitch i dont roll that way
by Dusty Duke February 13, 2012

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