bummin' 

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!"

bummin' by magicman4321 June 22, 2011

Bummin' 

When someone displays bum-like qualities.

Taylor: That guy just stole some free samples.

Bill: Ya, he's bummin'.

Bummin' by Dranard February 19, 2011

bummin 

To be sad and negative, bringing down the mood of those around you.

"Why is Jimmy bummin? Oh now I'm bummin... weekend ruined."

bummin by WWEEAAKKK February 13, 2008

bummin 

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.

bummin by chas November 24, 2003

bummin 

(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.

bummin by JOJOma April 16, 2006

Bummin 

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.

Bummin by Schwilly February 14, 2005

Bummin 

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.

Bummin by VetSchoolReject August 4, 2012