Reservoir Dogs -

Mr. Brown: [after Joe assigns names] Yeah, yeah, but "Mr. Brown"? That's little too close to "Mr. Shit".
Mr. Pink: Yeah, "Mr. Pink" sounds like "Mr. Pussy". Tell you what, let me be Mr. Purple. That sounds good to me. I'm Mr. Purple.
Joe: You're *not* Mr. Purple. Somebody from another job's Mr. Purple. You're Mr. Pink!