Top Definition
When you have absolutely nothing to do and waste time when you could be doing something productive (i.e. going outside).
Man I ain't got shit to do today, I'll just bum out.
by ubersmilee June 08, 2009
3 more definitions
bumout

1) A person (male or female) who brings a negtive feeling into any situation.

2) A person with a bad attitude.

3) anything that changes the overall feeling of a group of people to the negitive direction.
1) That George Bush is a total bumout.

2) I don't hang out with Jake anymore, he is a huge bumout.
by Ray Beck May 31, 2005
1) A person (male or female) who brings a negtive feeling into any situation.

2) A person with a bad attitude.
1) That George Bush is a total bumout.

2) I don't hang out with Jake anymore, he is a big bumout.
by Ray Beck May 31, 2005
Sneakily exposing ones rear while in a public place, especially in a crowded nightclub situation. This should be accomplished without being thrown out or arrested.
Junior got bum out in the club.
by MaxiJJ1 December 20, 2006

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