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A slang word combining the words ace and prime, two words used for describing something that is awesome. As such, primeace is (at least) twice as awesome.

Oh yeah, and Chuck Norris uses it.
The lower back of the lady over there is pretty primeace.
Barney Stinson is primeace.
Cheezburgers are really primeace!

School is not very primeace.
by L_F_K_1_2_3 April 27, 2011