A hum bumbler is the person at the party who is too drunk to sing the song, so they just hum it. Also they take it in the ass, wherein, bumbler becomes involved. SEE muff diver
Look'it that dumbass hum bumbler over there in the corner hummin' to himself. He must take it in the ass.
by loggy249 October 11, 2011
Can you define these popular missing words?