Top Definition
when a guy tries to use his thumb to finger a girl with the intention of pleasuring her, but it backfires and she does not enjoy it.
Everything was going for smoothly for Larry with the girl of his dreams until he inserted his thumb into Tara's juicebox and produced no more than a thumber bummer.
#finger dinger #juicebox #one scoop sundae #tampon #whisker biscuit
by Harry Rose September 02, 2010
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