Green’s Dictionary of Slang

1. nonsense.

1941

‘The Benghazi Mail Run’ in C.H. Ward-Jackson Airman’s Song Book (1945) 153: He [...] Suggests we bombed a dummy target, / Never heard such utter clot!

2. a fool, often used affectionately, e.g. you silly clot.

1946		G. Gibson Enemy Coast Ahead (1955) 163: ‘God! you’re a clot,’ he said disrespectfully.
1950s		Oh Boy! No. 13 8: Welcome back to the King of the Clots, the Drip of the Droops – Stuporman!
1956		J. Curtis Look Long Upon a Monkey 120: Isn’t that typical of the useless clot? Too bloody idle to be on his post whilst on guard.
1958		Willans & Searle Complete Molesworth (1985) 149: Look at the clot-faced wet.
1964		L. Nkosi Rhythm of Violence II iv: Will that clot shut up! He’s getting on my nerves!
1966		B. Reckord Skyvers I ii: You muddy-minded clot over there, you wouldn’t understand.
1976		P. Theroux Family Arsenal 172: That clot’s just wasting time.
1989		R. Dahl Rhyme Stew (1990) 34: And so a dozen brainy men / Met secretly inside a den / To formulate a subtle plot / To polish off this royal clot.
1991		Age (Melbourne) 7 Dec. 130/5: The words clown, clot [...] and dickhead [...] issuing from the lips [...] of the stipendiary magistrate.
2001		Guardian 24 Nov. Jobs 21/1: The fatheaded clot of masculinity [...] can’t cope with powerful women.