Example 1: (playful)
Man: I have a double rainbow shirt.
Woman: You've got to be shitting me!
Man: Nah! Totally got one!
Woman: No fucking way.
Man: Way.
Example 2: (serious)
Man 1: I was waiting around to be picked up for three damn hours.
Man 2:
Dude... you've got to be shitting me.
Man 1: Fuckin serious, man.