flim noun a five pound note; the sum of £5 UK,1870 Originally an abbreviation of “flimsy”, adjective and obsolete noun use for the early, large white banknotes.
You can give me a flim for the introduction. — Charles Raven, Underworld Nights, p. 90, 1956
[G]iving him two and a half pound out of a flim. — Kevin Sampson, Outlaws, p. 119, 2001
Thinks he’s a fuckin hero of the people cos he once gave a flim to Shelter. — Niall Griffiths, Kelly+Victor, p. 316, 2002