Green’s Dictionary of Slang

1. to have sexual intercourse [spike n.¹ (1)].

1896		Farmer Vocabula Amatoria (1966) 104: Enclouer. To copulate; ‘to spike’.
2007		R. Milward Apples (2023) 137: Rachel [...] in a mini-skirt and a very booby top — she was cruising for a spiking.

2. (Aus.) to hit someone hard, to knock someone down [SE spike, to pierce].

1941		Baker Popular Dict. Aus. Sl.
1999		G. Seal Lingo 45: The many other terms for fighting give an idea of the importance of this activity in larrikin life. bump, comb down, dish, dong, tob, spike, sort out, stonker, rip into, do, go the knuckle on, weigh into, wipe and quilt.

3. (N.Z. prison) to stab.

2001

D. Looser Boobslang [U. Canterbury D.Phil. thesis] 174/1: spike v. to stab.