look up any word, like donkey punch:
 
1.
there is a party in my pants
(used by guys when they have erections)
less ackward than saying: i have an erection
Guy 1- OMG there is a fiesta en mi pantalones everytime I see her!
Guy 2- I know, same.
Guy 1- Hey! she's my girlfriend!
by tomboy.brainiac November 01, 2010