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5.
Where two people remove their clothes and rub their bottoms together. Sometimes considered a sexual act, the art of bumming is also considered a ritual in some cultures. Commonly mistaken for anal sex, bumming is actually the craft of gentle contact between the arses.
Gary: "Wanna' have a bummin' sesh?"
Liz: "Yeah! Let's strip down and rub bums!"
by magicman4321 June 22, 2011
 
1.
To be sad and negative, bringing down the mood of those around you.
"Why is Jimmy bummin? Oh now I'm bummin... weekend ruined."
by WWEEAAKKK February 13, 2008
 
2.
(Verb) To hang around aimlessly in a state of total relaxation.
Susie: How come John's never out?
Max: He's always just bummin around his house, loser.
by JOJOma March 12, 2006
 
3.
In a state of sadness over somethin you can't get over.
Dude, I'm really bummin cause my car just got totaled cause I was stoned.
by Schwilly February 14, 2005
 
4.
Asking for something with no expectation of paying for it.
Bummin is not the same as begging. Begging is often done from desperation while bummin is just asking on an urge.
He be bummin cigarettes from folks.
by chas November 24, 2003
 
6.
Not being able to get off the couch due to depression, getting dumped/fired/rejected from vet school, or just because its one of those days.
Hey, wanna go to the bars?

Nah... I'm bummin.

Dude, come on. She didn't even have tits.
by VetSchoolReject August 04, 2012
 
7.
To be dissapointed in something that is sad.
I am really bummin about dropping Gabi back at her house for the night.

Gabi's bummin that we didn't even get to talk.
by DJ Podzilla January 16, 2011