Person who has blisters and sores on their thumbs because all they do is sit around all day and plays video games
Girl: Your brother is always in the house. And his thumbs are all nasty.
Boy: He's a thumber.
Girl: Oh! How could I not know!
Boy: He's a thumber.
Girl: Oh! How could I not know!
by A.O.A January 05, 2004
"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 04, 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 02, 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 03, 2010
by Gregory and Tari May 27, 2008
by Irish Revolutionary May 27, 2006