reflex punch Share definition Flag An involuntary fist thrust in result of something said by a millennial asshole. Adam: bro, that flatbill is supes gucci. Charlie: .... Adam: (reflex punched in the face) reflex punch by Charliecamelcase December 17, 2017 0 0 Get merch Get the reflex punch mug. Buy Now — $32.95 See more merch