Green’s Dictionary of Slang

cremorne n.

[pun on cream n.1 (1) + horn n.2 (1a) but note Cremorne Gardens, Chelsea, the increasingly notorious ‘pleasure gardens’ (fl. 1832–77)]

the penis.

[US]Maledicta IV:2 (Winter) 192: Sometimes this process is combined with a reference to come-juice and coming – e.g. shooting stick or shooting iron, culty gun, cream-stick, cremorne = cream horn.