Green’s Dictionary of Slang

barnyard adj.

SE in slang uses

In compounds

barnyard golf (n.)

(US) pitching horseshoes.

M. van Denbark ‘Nebraska Cow Talk’ AS V:1 71: Their ‘pitching horseshoes,’ sometimes called ‘barnyard golf,’ is a common pastime.
Dixon (IL) Eve. Tel. 24 Sept. 2/7: There were an even score of contestants who participated in the barnyard golf or horseshow pitching contests [DA].
[US]Mencken Amer. Lang. Supplement II 755: [note] The [...] vocabulary of golf [...] has also engendered African golf, crap-shooting, and barnyard golf, horseshoe-pitching.
barnyard hen (n.) (also barnyard hole) [hole n.1 (1f)]

(US Und.) any prostitute working for a given pimp, other than his most important or ‘head chick’.

[US]E. Brown Trespass 153: I’ve seen how fast a gal get to be the barnyard hole. The feathered nest for every dirty old rooster.
[US]Murtagh & Harris Cast the First Stone 19: They are glad, too, if the ones who are picked up happen to be important to their sweet men, if they are their ‘head chicks’ instead of just one or another of their ‘barnyard hens.’.
barnyard pimp (n.) [the role of the cockerel]

(US prison) fried chicken.

[US]Maledicta V:1+2 (Summer + Winter) 267: The late Colonel Sanders undoubtedly would have shuddered if he had heard inmates refer to fried chicken as barnyard pimp.
[UK]J. Morton Lowspeak.
barnyard preacher (n.) (also barn preacher)

(US) an unprofessional or part-time lay preacher.

[US]T.G. Fessenden Democracy Unveiled 184: We always possessed a violent antipathy to your bawling, itinerant, field and barn preachers.
[US] in DARE.
barnyard savage (n.) [US western barnyard savage, an untameable horse]

(US) a loutish country yokel.

[US]A. Adams Log of a Cowboy 81: The family were these razorbacked, barnyard savages.
[UK]Farmer & Henley Sl. and Its Analogues (rev. edn).
[US]H.B. Allen ‘Pejorative Terms for Midwest Farmers’ in AS XXXIII:4 265: [...] barnyard savage.
posting at forums.clandxm.com 🌐 I don’t think this inbred barnyard savage knows English very well. He could even be (dare I say it?) RETARDED.
barnyard yodeller (n.)

(US) a mule.

[US]A. Lomax Folk Songs of North America 429: That [...] critter, known to Americans variously as the barnyard yodeller, the hard-tail, the jug-head, the long-eared chum and the Missouri humming bird.