In Britney Spears's song '3' the lyrics "Got one eighty degrees" refers to 180 degrees meaning two opposites or in front and behind "her". She is "caught in between" or sandwiched as in spit roast.

The phrase spit roast is usually used in a derogatory and degrading way by male participants to brag about a threesome to other males. Spit roast(ing) implies that the two male participants are straight and "used" the female participant in a MFM threesome.

The phrase "one eighty degrees" or simply "one eighty" provides a subtle and tasteful alternative to "spit roast".

1, 2, 3
Not only you and me
Got one eighty degrees
And I’m caught in between
Countin’
1, 2, 3
We did one eighty degrees
She enjoyed one eighty degrees
Lets do one eighty degrees
by PeterToris January 3, 2010
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