The Big Bang Theory, Season 4

[after Leonard kicked Sheldon out of the app team]

Sheldon:
Alright, I suppose I'll go put on my bus pants.

Leonard:
What the hell are bus pants?

Sheldon:
They are pants one wears over one's regular pants when one sits on bus seats that other people have previously sat on. But, perhaps from your lofty heights atop the corporate ladder, you've lost touch with the struggles of the common man.

Leonard:
Look, I'm still happy to drive you to work. Nothing's changed in that regard; we're still roommates, we're still friends.

Sheldon:
Except you identified me, your best friend, as a gangrenous limb that needed to be severed from the organism and tossed away. A desperate act of a little man with a big Napoleon complex!

Leonard:
You know what? Go put on your bus pants.