Green’s Dictionary of Slang

pus-gut n.

also pus-guts, pussy-guts
[pussy adj.1 /pron. SE purse, i.e. a full purse + gut n. (1a)]

a term of abuse for someone with a fat stomach; the fat stomach itself.

[US]J.W. Carr in ‘Word-List From Northwest Arkansas’ in DN III:v 402: pussy guts, n. A corpulent man. ‘See that old pussy guts’.
Torch of Reason 126: God pity them air pus-guts thet corners all the grain and cotton and sich thet we have to live on.
[US]J. Conroy Disinherited 278: Old Pus Gut’s been horsin’ us to a standstill with that boloney.
[US]J. Conroy World to Win 220: ‘May I go now, officer?’ he said politely. You damned pus-gut, he thought.
J. Thurber Thurber Album 95: The pontifical doctor was likely to be named, in her pungent idiom, a pus-gut.
T. O’Brien Northen Lights 81: ‘Pus gut.’ She kissed him. ‘You’re a sleeper.’.
B. Mackinnon Meantime (1992) 121: I kick him in the middle of his pus-gut.
H. Rollins Eye Scream 8: Hey you! Hey fat fuck, I’m talking to you. Hey pus gut!
T. Grosz Sword for Mother Nature 33: ‘John, go get your rifle out of the trailer and we’ll take care of this bastard,’ bellowed pus gut as he stopped in his tracks.

In derivatives

pus-gutted (adj.) (also pus-gut, pusley-gutted, pussle-gutted, pussy-gutted)

corpulent.

[US]G.W. Harris Sut Lovingood’s Yarns 251: That ar pusley-gutted, leather whisky jug ove a jedge.
[US]Semi-Wkly Interior Jrnl (Stanford, KY) 18 Apr. 6/2: The pussy-gutted ‘Pap’ Ansley.
[US]L.W. Payne Jr ‘Word-List From East Alabama’ in DN III:v 361: pussle-gutted/pussy-gutted, adj. Corpulent, having a large abdomen. Often used as a term of contempt. ‘You low-lifed, pussy-gutted scoundrel.’.
[US]Omaha Dly Bee (NE) 6 Sept. 1/2: The God-forsaken, weasel-eyed, pus-gutted, hog-jowled spawn of hell.
[US](con. 1938) C. Chessman Cell 2455 116: You pus-gutted bastard.
[US]E. Thompson Garden of Sand (1981) 187: Shoot me! Dock me! Why you pus-gutted cocksucker.
W.W. Johnstone Out of the Ashes 154: ‘We are a part of the Georgia Militia,’ a pus-gutted, unshaven man said.
W.P. Robertson Lurking in Pennsylvania 127: Maybe he would even lose a few pounds and look more like the old ace fullback instead of old man Andrews, pus-gutted salesman for Happy Rest Mortuary.
V. Athanas Pursuit 147: And then they threw him out with a dishonorable discharge? I’d like to’ve seen their face when he told them pus-gut officers what they could do with it!
[US]D.R. Pollock Devil All the Time 203: ‘[D]don’t you worry about that pus-gutted blowhard’.