by mutto April 15, 2007

"I met up with this girl on tinder with the intention of going balls deep, but only managed a thumber bang"
by Thumber Bang July 4, 2014

A person who is in a serious relationship and continues to flirt, kiss, hang off of, or have sex with other people. Often several at the same time. This comes from the not so common phrase of someone "putting their thumbs in more then one pie."
by Lavinia Cay February 5, 2007

by johnicas August 18, 2009

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.
by Harry Rose September 4, 2010

by Gregory and Tari May 26, 2008

by Irish Revolutionary May 30, 2006
