Green’s Dictionary of Slang

1. in coin-tossing, a score of two out of three wins [presumably popular in this area of London’s East End].

1864, 1867, 1870		Hotten Sl. Dict.
1890–1904		Farmer & Henley Sl. and Its Analogues.

2. an upper-cut [? a blow favoured by East Enders].

1860		Hotten Dict. of Modern Sl. etc. (2nd edn).
1864, 1867, 1870		Hotten Sl. Dict.