unflushable

[kiki_eng]

Jeff: Steve, do you know what I call this kind of woman? You know, the total "can't get rid of".
Steve: Is this gonna be really tasteless? Am I gonna be ashamed to be your friend?
Jeff: It's a technical term. It's just a harmless expression...
Steve: Hit me.
Jeff: "unflushable"!
Steve: Turn around Jeff, walk away!
Jeff: You know, because they keep bobbing around!
Steve: No, no, no, Jeff! GO! GO! ... Don't look back. GO! 

(from Coupling)