Used as an expression of defiance.
Popularized by the viral video clip 'His Name Is James Bond', which features amusing lyrics detailing the ways in which the titular secret agent is an asshole who basically does what he wants without caring about the consequences.
The lyric runs: "Because I'm suave you can suck it, I'll ski on your lunch if I want/take a walk on the heads of some reptiles, then act heaps nonchalant."
MAN 1: Dude, what the hell are you doing coming out of that bathroom with my wife??
MAN 2: I'll ski on your lunch if I want.