Trece

a word you shouldn't say in front of Mexican people as they will respond with many different sexual innuendo rhymes such as:
-mientas mas me lo mames mas me crece (the more you stroke it, the more it grows)
-te la meto por detras y se desaparece (I put it from behind and it {dick} disappears)

-cuantos puntos tienes?
-trece
-mientras ma me la mames mas me crece