favourite new character on Simpsons: Johnny Tightlips, the latest full fledged member of Fat Tony's crew legitimate businessman's club.

some of his recent scenes:
Legs: Johnny Tightlips, where'd they hit ya?
Johnny Tightlips: I ain't sayin' nothin'.
Legs: But what'll I tell the doctor?
Johnny Tightlips: Tell him to suck a lemon.
***
Fat Tony: Johnny Tightlips, can you see the shooter?
Johnny Tightlips: I see a lot of things...
Fat Tony: You know, you could be a little more helpful.
***
Fat Tony: Ahh, my Joi'zee muscle... It's so good to see you. Did you have a nice flight Johnny Tightlips?
Johnny Tightlips: I ain't sayin' nothin'
Fat Tony: I undastand.. How is your motha'?
Johnny Tightlips: Oh ey, who says I have a motha?
heh, he is a cool dude.