ass; buttocks; butt (baby talk)variation of BUM
Mrs. Jones told her little boy to make sure he washed his bummy well while in the shower.
by Jon64Bailey February 07, 2013

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Girls who are a hoe/whore/slut/ anything in that frame of mind. They can travel in packs of two or three. Usally in one's. They wear revealing outfits most of the time. The one's you should really watch out for are the undercover bummie's who pretend to be sugar and spice and everything nice.In truth there just another bummie.
Girl 1:

Hey where's your boyfriend?

Girl 2:

Oh, he's just out with some of his friends

Girl 1:

Careful now you don't want him out with some Bummie's down the lane
by Just saying June 27, 2008

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When you are dressed like a homeless person or "bum" or you are mis matching,the colors look cheap and you just look bad all together.
Ugh, why do you always come to school looking bummy?

Look at your clothes, you're so bummy.
by C V R May 14, 2009

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a fifty cent soda like tropicana or c&c
Im gonna get a bummy from the store
by Baconator December 07, 2007

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noun an aerial manouvre performed off a diving board involving making first contact with the water surface with the buttocks, or a single piece of buttock. The bummy results in a imposing display of man and water that onlookers will find awe inspiring and will create a sonic boom so powerful it has bee known to blast bikini tops off nearby BummyHo's.

It is also polite and acceptable to enquire after witnessing a bummy how many pairs of shorts the bummy artist was wearing before you dive in.

Not to be confused with an old man who writes books under the pseudonym 'Bummy'
"hey bro, you rockin' 4 pairs of boardies for that bummy??"
"nah man, that shit was raw"
by b-b-b-basketbawl January 04, 2010

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person with exceptionally cutey bum!!!
hello bummies!!!
by bumbumthefirst September 18, 2008

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Short shorts. Or really small shorts. Australian?
I love the way my cottage cheese thighs look in these bummies.
by Ellieee November 16, 2007

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