The OED folks have published a list of terms for which they're seeking further verification or antedating. On checking a few, I find that good antedates can be found simply from Googles News-Archive, selecting appropriate dates.

Let's help the OED folks by checking through these and giving them some good cites. (Don't worry if the cite you find is to a paid-subscription-only source. No doubt OED can get into that source.)

For convenience, here is the OED's list. For each term, OED explains its question here, and you'll want to check that out before researching the term.

bananas (1968-70)* . . . . . . . . . . . . .mucky pup (1984)
Bloody Mary (1956)* . . . . . . . . . . . . .one sandwich short (1993)
bonkers (1957)* . . . . . . . . . . . . . . .plonker (1966)
bung (1958)* . . . . . . . . . . . . . . . . . .pole dance (1992)
daft/mad as a brush (1945) . . . . . . .prat (1968)*
dog and bone (1961) . . . . . . . . . . . .regime change (1990)
dogging . . . . . . . . . . . . . . . . . . . . .round robin
dog's bollocks (1989) . . . . . . . . . . . .shaggy dog story (1946)*
domestic (1963) . . . . . . . . . . . . . . .shell-suit (1989)
duh brain . . . . . . . . . . . . . . . . . . . .sick puppy
flip-flop (1970) . . . . . . . . . . . . . . . . .spiv (1934)*
glamour model (1981) . . . . . . . . . . .stiletto (1959)
Glasgow kiss (1987) . . . . . . . . . . . . .take the mickey (1948)*
Gordon Bennett . . . . . . . . . . . . . . . .tosser (1977)
hoodie (1990) . . . . . . . . . . . . . . . . . .trainer (1978)
identity theft (1991) . . . . . . . . . . . . .twoc (1990)
Jack the Lad (1981)* . . . . . . . . . . . . .wally (1969)*
kinky (1959) . . . . . . . . . . . . . . . . . . .wazzock (1984)*
loo (1940)* . . . . . . . . . . . . . . . . . . . .whoopsie (1973)
marital aid (1976) . . . . . . . . .. . . . . .wolf-whistle (1952)

This message has been edited. Last edited by: wordnerd,

Bob posted about this in 'Questions and Answers About Words' back on 3 January. See https://wordcraft.infopop.cc/eve/forums/a/tpc/f/932607094/m/3221093224

So did I, but I deleted my post when I discovered Bob had started his thread before me.

I'll leave this thread here, but close it to new posts so that we don't have two threads running concurrently.

Oops! I'll add a cross-link there.