Vanish, Foyst!

John Marston (1576–1634), The Dutch Courtezan 3.3.50-51, in The Works of John Marston, ed. A.H. Bullen, Vol. II (London: John C. Nimmo, 1887), p. 61:

Every man's turd smells well in's own
nose. Vanish, foyst!

Foyst = foist = fist. See Oxford English Dictionary, under fist, n.²: "A breaking wind, a foul smell, stink."

"Vanish, foyst!" is a useful exclamation to utter when someone breaks wind.