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!
Something or someone that is completely awesome. The real spelling of the french word "primo." Anything primeaux is totally cool and brings happiness to those around it/them.
Dude, that chick is soo primeaux, imma get her number.
Prumano is a ship in the Hetalia fandom pairing the characters Prussia and Romano, or Gilbert and Lovino. It's not the most popular ship, but it most likely arose because their brothers, being Veneziano and Germany, are what some will consider the most popular ship.