A lot vs. Alot: 9 Grammatical Pitfalls
also pot-luck, 1590s, from pot (n.1) + luck; with notion of "one's luck or chance as to what may be in the pot." As an adjective from 1775.
: Come on and dine pot luck
: pot-luck supper
A meal composed of odds and ends of leftovers, or of whatever turns up (1600+)