Duncan is blind, and kind of racist. And he has been unwittingly hanging out with Azeem for some time now.
Duncan: A curse on Moors and Saracens! If it were not for their ungodly ways, Master Robin would never have left. (Beat) What manner of name is "Azeem"? Irish? Cornish?
(Duncan cringes in fear.)
"Fuck me, he cleared it!"
The Sheriff is storming around Mortianna's quarters, flailing a whip at the walls, and ends by picking up a knife and stabbing several pieces of raw meat on a plate. Mortianna's response: "Something vexes thee?"
This outburst from the Sheriff:
Nottingham: Cancel all the kitchen scraps for the lepers, no more merciful beheadings... and call off Christmas!
During the Final Battle, a guard on the castle battlements charges Azeem, who pulls out his sword and makes a few threatening gestures with it. The guard immediately turns around and runs away.
Azeem handing a telescope to Robin, who promptly is wigged out by this strange device he's never encountered before. (In this case, "wigged out" = "trying to stab the men who are over a mile away because the telescope shows them close up".)
Azeem: How did your uneducated kind ever take Jerusalem?
Robin: God only knows.
After Robin cuts the Sheriff's cheek during an early confrontation, some unidentified smartass in the castle evidently has a bust of the Sheriff defaced to include the new scar. The Sheriff takes notice of this and distractedly tries to buff it out during one of his rants, and during the Storming the Castle sequence Robin is momentarily pulled out of the moment when he stops and does a Double Take at the scar on the statue.
"LOCKSLEY! I'm going to cut your heart out with a spoon!"
Guy of Gisborne: Why a spoon, cousin?
Nottingham: Because it's dull, you twit! It will hurt more!
The frustrated Nottingham to two women he passes by.
Nottingham: You, my room, 10:30 tonight. (to the other woman) You, 10:45... And bring a friend!
Friar Tuck's first encounter with gunpowder.
The Sheriff's epic eye roll when Robin crashes his wedding.
Maid Marian stumbles over Robin bathing in a waterfall and gets an eyeful. Helped by her nursemaid happily commenting, "Oh, my lady, look!"
Gets an extra bit of funny when they finally speak, and she tries to play it cool and ask "What are you doing here?" as if she doesn't know that her old friend Robin of Locksley is Robin Hood. He replies, "Taking a lady's advice." (Which is a reference to a funny moment from earlier in the film: Robin smears himself with horse manure to pose as a beggar and sneak in to talk to Marian, and at the end of their conversation Marian asks him, as a personal favor to her, to please take a bath.)
"There was a rich man from Nottingham who tried to cross a river! What a dope, he tripped on a rope! Now look at him shiver!"
In a very black comedy way, the Sheriff of Notingham Comically Missing the Point about having "something pure" once in his life, as he begins trying to rape Marian in the middle of their wedding ceremony, with the corrupt bishop performing the service looking on in increasing horror. In particular, the shot of the Sheriff arching up his hips, planting his feet against Marian's ankles, and dropping suddenly to spread her legs is darkly, disturbingly hysterical.
And then having 'problems'. "I can't DO this with all that racket!"
And Morgana tapping him on the shoulder to hand him a pillow. Yes, by all means, let's at least have the decency to make the woman comfortable while you violate her.