Top definition
a seemingly disinteligent person who never misses a chance to prove their lack of smarts; might have been janked from birth.
"sometimes I itch my nuts and then sniff my hands..."

"What a jankbox!"

"Hi pretty lady, my name is Ben. wanna see me do the sackwag?"

"Jankbox strikes again!"
by Austin Schertz February 05, 2009
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