A person who insecently steals or bums gum off of people because they are too lazy to go out and spend 35 cents to have their own.
"She's such a gum bummer. She got a piece of gum from me every day this week. What's up with that? She should go get her own."
by Lydia Suzanne May 17, 2007
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People on the beach who when you see from behind can ruin your day because there swimsuits and butts are the wrong size for each other.
I was having a good time relaxing at the beach until I saw a bummer butt and had to go home.
by Bullshitzer June 9, 2010
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A retarded homosexual who scours the Urban dictionary giving thumbs down to everyword just for the hell of it. They also enjoy shoving their thumbs down into their underpants and giving their anus a good poke.
"Watch out for this one." "He's a dirty little thumb bummer."
by Mr Lizard August 25, 2004
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one who indulges in the act of buggering cats.
tom is a cat bummer. on fridays him and several friends enjoy a good night in buggering cats.
by Daz183 January 26, 2009
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Catching AIDS is a common modus mortem for the suicide bomber.
Pass the AZT, I was recruited as a suicide bummer.
by Ian Chode February 24, 2004
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