When the sex you had was so good that it's over 9000.
Bill: I had sex with Jane last night, and I hit the 9000th base!!

Bob: You really need to stop watching those Dragonball Z episodes...
by MrsAmazingful March 18, 2011
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When her power level is over 9000 but you go ahead anyway.
A: I was with that girl last night, but her power level was over 9000
B: What did you do?
A: Fucked her anyway.
B: WOAH!!! Over 9000th base. You are so awesome.
by Davemaybelikesbananas January 2, 2010
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