I'm John Share definition Flag Used to imitate someone in a mocking tone; to point out there flaws or weaknesses by a comparison to "stupid John." "Hey guys, I got a B on my physics test." "I'm John... I like cock..." I'm John by I'mJohn October 23, 2009 0 0 Get merch Get the I'm John mug. Buy Now — $32.95 See more merch