A John Wayne reference. Any kind.
NPC: "What are you doing out here in the wastes pilgrim?"
Drill Sgt. speaking to his young NCR lieutenants: "Don't apologize—it's a sign of weakness."
Courier: Hey I'm looking for a guy in a checkered outfit have you seen him?
NPC: Ha ha That'll be the day....
Courier:" I haven't lost my temper in many years; but, Pilgrim, you caused a lot of trouble this morning; might have got somebody killed; and somebody oughta belt you in the mouth. But I won't. I won't. The hell I won't!" (He belts him in the mouth)."
Courier: "Out here, due process is a bullet!"
Courier: "I won't be wronged, I won't be insulted, and I won't be laid a hand on. I don't do these things to other people, and I require the same from them."