Green’s Dictionary of Slang

dressed up, esp. showily.

1880		Manchester Courier 24 Dec. 12/6: That cove’s here again. I saw him at the ‘Mendacity’ yesterday, ‘toffed’ up.
1888		‘’Arry on St. Swithin’ in Punch 4 Aug. 49/1: Yours truly was toffed up superb, / In a thick hoatmeal suit of splashed dittos.
1899		Bristol Mercury 2 Nov. 6/2: He comes in toffed up ready for the day with a big cigar on.
1899		Dubbo Dispatch (NSW) 17 Nov. 8/2: Loo was regularly toffed up an’ looked better than I thought it possible.
1929		J.B. Priestley Good Companions 10: ’E doesn’t like to see these lads all toffed up.
1937		E. Raymond Marsh 88: You can’t get past the beak by toffin’ up, yer know.
1939		H.E. Bates My Uncle Silas 124: My Uncle Silas looked at the flowers in his buttonhole. ‘Toffed up a bit?’ he said.
1950		Aberdeen Jrnl 28 July 2/5: The older ones [i.e. girls] frantically ‘toffed up’ in best frocks and shoes.
1999		Indep. Mag. 9 Oct. 6: You do see other glamorous Witnesses, and when you go to the big Witness assemblies they’re all toffed up.