Green’s Dictionary of Slang

1. drinking heavily; also as abusive adj.

1832		S. Lover Legends and Stories 187: Bad cess to you, you pot-walloppin’ varmint.
1865		Leaves from Diary of Celebrated Burglar 89/1: This hulking, lounging, pot-walloping vagabond [...] lived on what his ‘moll’ could bring in.

2. washing dishes.

1921		P. MacGill Lanty Hanlon (1983) n.p.: All the pot-walloping scum of the market gurgled in [BS].
1922		Joyce Ulysses 356: Sad however because it only lasts a few years till they settle down to potwalloping.
1941		K. Tennant Battlers 137: A position it would be an over-statement to call ‘pot-walloping’, since it was, even more than Dancy’s job, concerned with washing and scrubbing.
1953		L. Uris Battle Cry (1964) 122: You’re going to be pot walloping the rest of the cruise.