Green’s Dictionary of Slang

cob n.2

[SE corncob]

1. (US) a farmer, a rustic [+ ? derog. ref. to supposed use of corncobs in the privy as a substitute for lavatory paper].

[US]Wentworth & Flexner DAS.

2. (S.Afr. drugs) a quantity of marijuana, about the size of a corncob and sometimes packaged in maize leaves.

G. Hugo in Forum 6:2 19: Remember that cob of Malawi we had just after the vac [DSAE].
[SA]Sun. Times (Johannesburg) 18 July 11: Last month, the customs official found a ‘cob’ of Malawi dagga in her luggage [DSAE].
[SA]Mail & Guardian (Johannesburg) 24 Sept. 🌐 Hook yourself up with a buddy in Obs [i.e. the Cape Town suburb of Observatory]. Get on that Swazi or Transkei Reds. or Malawi Cob.

SE in slang uses

In phrases

off the cob (adj.) [play on corny adj. (1)] (US)

1. unfashionable, out of style.

[US]Detroit Free Press (MI) 17 Sept. 8/1: ‘We don’t care about these ricky-tick bands like [Guy] Lombardo. That schmaltz stuff is strictly off the cob’.
[US]Cab Calloway New Hepsters Dict. in Calloway (1976) 258: off the cob (adj.): corny, out of date.
[US]F. Brown Dead Ringer 38: The music was strictly off the cob, of course, but it’s funny; you don’t mind corn when you’re playing it yourself.
[US]Green & Laurie Show Biz from Vaude to Video 46: The idiom gave way to corny, icky, off-the-cob and square from Delaware.

2. backward.

[US] ‘Jiver’s Bible’ in D. Burley Orig. Hbk of Harlem Jive.
on the cob (adj.) [play on corny adj.]

(US) sentimental, simplistic, banal.

[US]Charleston (WV) Daily Mail 27 June 8/8: ‘On the cob,’ ‘corny’ and ‘Joe McGee’, all of which pertain to obsolete methods of interpreting popular music.