Doors, The Ed Sullivan: Look, you boys don't forget to smile now. There's no reason to be so sullen out there...
Jim: Uh well, we're kind of a sullen group, Ed.

Inferno by Dante Alighieri Fixed in the slime, they say, 'Sullen were we in the sweet air that by the Sun is gladdened, bearing within ourselves the sluggish fume; now we are sullen in the black mire.' This hymn they gurgle in their throats, for they cannot speak with entire words.

O.C., The Alex: Marissa's not... happy.
Julie: Marissa and happy parted ways about her 16th birthday but have you met her new friends sullen and vindictive?
Alex: No, the only ones she's brought over to the house are scared and overwhelmed."

Archer Malory: And I don't want another one of your sullen whores using my medicine cabinet like a Pez dispenser.

Saint Augustine We cannot pass our guardian angel's bounds, resigned or sullen, he will hear our sighs.

Moral Orel Dolly: Well, I guess when you have a family, that's the sacrifice you make.
Clay': Sacrifice! Exactly! I sacrificed. The ultimate sacrifice: my happiness for my kids! You bet I did! You bet I did. And I do it again, too! I'd do over and over again! That's my life! Over, and over, and over, and over, and over...
Dolly: Okay, Clay. I get the point.
Clay: NO. YOU. DON'T! And over, and over, and over, and over, and over...

The Ballad of the White Horse by G. K. Chesterton By the yawning tree in the twilight
The King unbound his sword,
Severed the harp of all his goods,
And there in the cool and soundless woods
Sounded a single chord.
Then laughed; and watched the finches flash,
The sullen flies in swarm,
And went unarmed over the hills,
With the harp upon his arm,
Until he came to the White Horse Vale.

Henry IV, Part 2 by William Shakespeare Yet the first bringer of unwelcome news
Hath but a losing office, and his tongue
Sounds ever after as a sullen bell,
Remember'd tolling a departing friend.

Gone in 60 seconds Det. Roland Castlebeck: I'm a police officer. If you kill me, your life is over.
Calitri: No, you got that the wrong way 'round. If I kill you, your life will be over.

Leaves of Grass by Walt Whitman Down-hearted doubters dull and excluded,
Frivolous, sullen, moping, angry, affected, dishearten'd, atheistical,
I know every one of you, I know the sea of torment, doubt, despair and unbelief.
…
Be at peace bloody flukes of doubters and sullen mopers,
I take my place among you as much as among any,
The past is the push of you, me, all, precisely the same,
And what is yet untried and afterward is for you, me, all, precisely the same.
I do not know what is untried and afterward,
But I know it will in its turn prove sufficient, and cannot fail. (43)