Top definition
A term for the last 9 holes in an 18 hole golf course, used as a euphemism for anal sex.
Honey, I have seen 7 baronesses come and go, they all say the same thing: The master likes playing the back 9 at Augusta. - (Eunuch 2) "Love-Bheits." The Venture Bros. AdultSwim. 20 Aug. 2006. Television.
by BreakfastLizard December 29, 2013
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2
The second half and presumingly less attractive years in a woman's life.
Maddison was a hottie in 2001 but now she's on the back-9
by Fraz Von Hoffer May 18, 2016
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