Green’s Dictionary of Slang

1. steak.

1887		‘Dict. of Diningroom Sl.’ in Brooklyn Daily Eagle 3 July 13: ‘One slaughter on the pan,’ is a porter house steak.
1902		O. Wister Virginian 150: ‘And beefsteak, rare.’ ‘One slaughter in the pan, and let the blood drip!’.
2000		(con. 1940s–60s) Décharné Straight from the Fridge Dad.

2. scrambled eggs.

1908

Dly Missoulian (MT) 18 May 4/3: If the old lady [...] expressed a desire for scrambled eggs the ‘slaughter in the pan’ of the waiter might have aroused her apprehensions.