Green’s Dictionary of Slang

a notably fussy person.

1921		G. O’Donovan Vocations 16: You are a fuss-pot. First you won’t and then you will .
1936		N. Marsh Death in Ecstasy 178: Desiccated, tittuppy, nice old fuss-pot.
1947		N. Streatfeild Grass in Piccadilly 196: Old fusspot!
1954		A. Buckeridge According to Jennings (1991) 110: Oh, don’t be such a fusspot.
1960		(con. c.1918) D. Holman-Hunt My Grandmothers and I (1987) 31: I hope you’re not a fusspot.
1975		D. Davin Breathing Spaces 47: Now, Jean, don’t be an old fusspot.
1987		R. Prawer Jhabvala Three Continents (1988) 347: I know I’m an old fusspot.
1994		F. Mac Anna Ship Inspector 2: She just smiles [...] and tells me not to be such a fusspot.
2000		Guardian Rev. 3 Mar. 13: Neil Young has about-faced into an agonising studio-bound fusspot.