Green’s Dictionary of Slang

oats n.2

[SE phr. feel one’s oats, sow one’s wild oats]

(also grains) sexual satisfaction.

[[UK] R. Howard The Committee V i: Put forth some good words, as they use to Shake Oats when they go to catch a skittish Jade].
[[UK] ‘Song’ in Playford Pills to Purge Melancholy II 276: Must I beat the Bush while you catch the Game; / Sow your wild oates, / And mind not her wild notes].
[US]Whip & Satirist of NY & Brooklyn (NY) 2 July n.p.: the whip wants to know What that blood means that deals in horse-feed by dodging in and out of Suse Shannon’s area, and if he goes to get his grains?
A. Baer ‘Bugs’ Baer 25 Nov. [synd. col.] Mrs Tweedle-Fatt is a pacer [...] She likes her oats.
[UK]J. Manchon Le Slang.
[US]J.T. Farrell Gas-House McGinty 230: You watch your oats or you’ll be gettin’ in the same kind of a pickle.
[Aus]R.S. Close Love me Sailor 52: He can save his damned oats up until we get into port—like any sailor.
[US]B. Jackson Get Your Ass in the Water (1974) 135: You been foolin’ with your oats, you been messin’ with your hay, you say, ‘If you take me back, baby, I’ll do it the other way.’.
[UK]Sun. Times Mag. 30 Sept. 38: Look at all them black women selling their f--- oats. Selling themselves.
[UK]P. Bailey An Eng. Madam 99: Typical man, I thought – all smarm when he wants his oats.

In phrases

get one’s oats (v.)

to gain sexual release.

P.A. Meade Born to Trouble 92: Barker had said to me that any soldier who had never had his ‘oats’ was no bloody good.
[Aus]Baker Popular Dict. Aus. Sl. 50: Oats from (a woman), get one’s, to coit with a woman.
[Aus]W. Dick Bunch of Ratbags 188: You’re doin’ O.K., Cookie, you’re gonna get your oats tonight for sure, I thought to myself.
[UK]B. Naughton Alfie Darling 196: Once I know I’m going to get my oats for certain I like to exert this final bit of self-discipline.
[UK]P. Bailey Eng. Madam 46: He was getting his oats, mind you, even though I was eight months gone.
[UK]C. Dexter Remorseful Day (2000) 296: Well ... Chap’s got to get his oats occasionally.

SE in slang uses

In phrases

know one's oats (v.)

(US) to display sophistication, usu. sexual.

[US]Judge (NY) 91 July-Dec. 31: Knows His Oats - Has been around (usually one who pets well).
[UK](con. 1895) T. O’Reilly Tiger of the Legion 44: He [i.e. a lion] had grown old in the show-business, and he knew his oats down to the very last ear .
off one’s oats

feeling unwell, esp. if this diminishes one’s appetite.

[Aus]Stephens & O’Brien Materials for a Dict. of Aus. Sl. [unpub. ms.] 106: OFF HIS OATS: slang sick, indisposed, unable to eat well.
[Aus]Sun. Times (Perth) 26 Nov. 1/1: A Barrack-street agent is off his oats since his bar-girl got spliced [and] the charms of the counter lunch no longer attact the opulent oaf.
[US]E. O’Neill Long Voyage Home (1923) 5: I’m sick an’ orf me oats.
[UK](con. c.1900) J.B. Booth London Town 291: Lakey observed one night with sadness that Dunn was ‘off his oats’.
[UK]Wodehouse Right Ho, Jeeves 80: You must refuse your oats at dinner tonight.