backbacon is the fat that hangs over a woman's bra straps in the back. this is usually apparent for several reasons:

1)her bra and/or shirt is too tight/small
2)she is overweight
3) a combination of all of the above.

fat girls are notorious for back bacon either because they have outgrown their bras or are in denial that they have such bacon...a larger shirt should cover up the incidental back bacon that can occur even on a thinner woman when a bra is pinching.
back bacon has an unmistakable look...while walking behind a woman, you can see the outline of her bra and the resulting fat spilling over the top of the bra in the back, resembling rolly/rippling lumps that resemble bacon or a pack of franks. x2 if the bacon bounces when she walks, sorta like a muffin top but with the bra vs. the pants
this broad at BJ's was so fat that her back bacon jiggled when she laughed!

her back bacon is making me sick...that shirt is way too small and so is that bra.

did you see the back bacon on that fat girl in front of us in line? looks like a pack of oscar mayers.
by alicia s April 15, 2008

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Top Definition
More commonly known as peameal bacon served with breakfast. Also known as the fat that sticks out of the sides of chicks who where clothes that are too tight, or wear high cut tops and low cut pants, leaving blubber or 'back bacon hanging out the side.
Holy shit man, look at all the back bacon on that chick, you could feed a family of twelve with that.
by Dr.D!gs June 17, 2004

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A game where you mount or jump on the back of a police officer for as long as possible.
Hey john, im bored, wanna beat the back bacon record of 23secs? " Yeah ,sure. I know where they chill
by Daffron June 12, 2010

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when some one has so much fat that they're back starts to grow rolls & breast.
go to your local wallmart, look for back bacon on big people. (remember its easy, just look when they're back is turned )
by ice_roberts December 09, 2010

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