Green’s Dictionary of Slang

b.s. n.

[abbr. bullshit n.; note synon. WWI Aus. milit. beer esses, based on signalman’s pron. of b.s.]
(orig. US)

1. rubbish, nonsense; also as attrib.

see bullshit n. (1)
[US]‘Terms Peculiar to West Point’ Howitzer 118: B.S. [...] volubility of discourse, or verbosity.
[US]P.W. Long ‘Semi-Secret Abbreviations’ in DN IV:iii 246: b.s. Bovine excrescence.
[US]A.D. Boyd letter 25 Nov. [Internet] That stuff about us needing clothes and blankets is B.S.
[US]M. Bodenheim Georgie May 73: They love to haind out that ol’ b.s.
[UK](con. WWI) F. Richards Old Soldiers Never Die (1964) 134: This [...] war correspondent [...] was a great romancer and wrote the biggest B.S. of them all.
[US]‘Ed Lacy’ Room to Swing 60: Sybil would have loved this kind of b.s.
[US]C. Brown Manchild in the Promised Land (1969) 269: The psychiatrist would say that I had complexes and all this. That was a lot of B.S.
[US]I. Faust Willy Remembers 161: I know, he said with a pre-b.s. smile.
[US]‘Joe Bob Briggs’ Joe Bob Goes to the Drive-In 171: I told Bobo to hold off on the b.s.
[US]T. Jones Pugilist at Rest 11: After the usual what’s-been-happening? b.s., he got down to business.
Atlantic Online June [Internet] Cadets at West Point called voluble talk B.S. as early as 1900 – evidently a transparent abbreviation even then.
[Ire]P. Howard Curious Incident of the Dog in the Nightdress 28: ‘That’s total BS and you know it.’ [Ibid.] 144: [He]’s spouting all sorts of BS about the Armenian Quarter.
[US]Simon & Mills ‘React Quotes’ Wire ser. 5 ep. 5 [TV script] They know that these charges ain’t nothin’but B.S.
Sowetan (SA) 9 May [Internet] I see a man sitting on his stoep and talking BS about the k****** [i.e. kaffirs].
[UK]I. Welsh Decent Ride 5: Fucking Mortimer, can’t see to anything. Puts me through this BS.
[Aus]T. Spicer Good Girl Stripped Bare 222: There’s no BS with these women. They’re honest as the day is long.

2. in fig. use.

[US]O. Hawkins Ghetto Sketches 196: Fergy [...] hits the bottom step of the front stoop, heading for the great b.s.

3. see brown shower under brown adj.2