It's in "Liar! Liar!" He's not doing his "Mexican" act. When Butt-head is being questioned, Beavis is sitting alone practicing his "defense", which consists of:
I DIDN'T DO IT!! heh, heh-heh, m-heh .. I DIDN'T DO IT! It was, like, some foreigner! I DIDN'T DO IT, BUNGHOLE!!! heh,heh BUTT-HEAD DID IT!!! Yeah. Hehe, m-heh heh.
-J.C.W.
J.C.W. answered:
Sorry, I thought his Mexican act was also in the 'liar,liar' episode, because I would like to know what Beavis is calling. He's doing it in several episodes, but I do not know the names of the episodes.
Does anyone know the text and explanation??
frido
Of course there is also:
Liar, Liar, pants on... WOAH!!!
Oh yeah, heh, heh, heh.
Great line.