MENDEZ is a famous Spanish surname and it can be synonymous to the Español. Then, probably, the translation will be?
DO YOU UNDERSTAND SPANISH'
Yeah, it's a slang which means, do you undestand?
and mendes just because it rhymes haha..
Me comprendes mendes, yo se que tu me entiendes! That's the complete phrase =)
"do you understand me', I know you understand me" that would be the meaning...
I've heard several of these name-related puns. One I hear a lot is simón, meaning yes.
BTW, Chula69, your user name is, er, interesting...