Green’s Dictionary of Slang

1. a flea.

1931		Everyman 26 Mar. in DSUE (1984).
1960		J. Franklyn Dict. of Rhy. Sl.
1960, 1975		Wentworth & Flexner DAS.

2. (also tancy lee) tea.

1933		M. Marshall Tramp-Royal on the Toby 66: In the morning, after a tasty breakfast of dog’s body and kill-me-dead washed down on lashings of Nancy Lee, the Cockney and I quitted the university town.
1960		J. Franklyn Dict. of Rhy. Sl.
1972		Dodson & Saczek Dict. of Cockney Rhy. Sl.