Green’s Dictionary of Slang

gloom n.

also gloom shedder

(US) a depressed and/or depressing individual.

[[US] in N.E. Eliason Tarheel Talk (1956) 274: Their daughter has eloped [...] it has the appearance of [...] glooming the Father for life].
[UK]D. Lowrie My Life out of Prison 212: You’re getting to be a regular gloom.
[US]F.S. Fitzgerald This Side of Paradise in Bodley Head Scott Fitzgerald III (1960) 79: ‘I’ve got a class at eleven-thirty.’ ‘You damned gloom!’.
[UK]W.S. Maugham Bread-Winner Act I: Oh, God, you are a gloom, Judy.
[US]J. Dixon Free To Love 112: He is, my precious old gloom, but why bring that up?
[US]‘R. Scully’ Scarlet Pansy 345: She is gay, not morose, not a gloom shedder.

In compounds

In phrases

gloomed up (adj.)

(US) depressed or depressing.

[US]H.C. Witwer Smile A Minute 27: It helps take people’s mind off of the war and prevents ’em from bein’ all gloomed up.