Green’s Dictionary of Slang

1. (also lollypopper) a police officer [cop n.¹ (1)].

1960		J. Franklyn Dict. of Rhy. Sl.
1965		F.J. Hardy Yarns of Billy Borker 96: He demanded that Hungry take him to the police station. Well, Hungry obliged — without switching the meter off, of course. At the Bastille the lollipop said the fare must pay the price showing on the meter.
1971		F.J. Hardy Outcasts of Foolgarah (1975) 35: They’ve sent for the lollipops.
1983		R. Aven-Bray Ridgey-Didge Oz Jack Lang 35: Lollypoppers Coppers (police).

2. a shop.

c.1921		T. Norman Penny Showman 12: We must get a Lolly Pop, (shop).
1934		P. Allingham Cheapjack 308: The finger had had a look at my lolly [...] and had decided it was not a bit like the joint his wife had described. [Ibid.] 319: Lolly – A shop. Lolly worker – A swindler who starts a shop and immediately sells the alleged goodwill.
1969		S.T. Kendall Up the Frog.
1972		Dodson & Saczek Dict. of Cockney Rhy. Sl.
2000		J.J. Connolly Layer Cake 23: Morty stuck a couple of bashers in the lolly pops.

3. a monetary tip [drop n.¹ (6a)].

1960		J. Franklyn Dict. of Rhy. Sl.
1972		Hall & Adelman Gentleman of Leisure 8: Most men just give their women lollipops and that’s that. The men give my girls lollipops and I end up with the lollipops.