This is one of my Favourite  Mal arguments

Lund: [drunk] Hey, you gonna drink t'the Alliance with me? Six years today, the Alliance sent the Browcoats runnin', pissin' their pants. You know, your coat is kind of a brownish color.

Mal: It was on sale.

[drinks]

Lund: You didn't toast. Y'know, I'm thinkin' you're one o' them In'apendants.

Mal: And I'm thinking you weren't burdened with an overabundance of schooling. So why don't we just ignore each other till we go away?

Lund: The Independents were a bunch o' cowardly inbred piss pots. Should'a been killed off o' every world spinnin'.

Mal: [puts down drink] Say that to my face.

Lund: [threateningly] I said... you're a coward and a pisspot. Now what're you gonna do about it?

Mal: [smiles suddenly] Nothing. I just wanted you to face me so she could get behind ya.

[Lund turns, and Zoë hits him in the face with the butt of her gun]

Mal: Drunks are so cute.