fugh, v. — Green’s Dictionary of Slang

fugh v.

[used mainly by its popularizer Brendan Behan (1923–64) in his autobiographies Borstal Boy (1958) and Confessions of an Irish Rebel (1965)]

a euph. for fuck v. in a variety of senses (cf. fug v.).

1916		J. Lait ‘The Septagon’ in Beef, Iron and Wine (1917) 18: Fugh—me for the pleasant things of life!
1958		(con. 1940s) B. Behan Borstal Boy 65: But rise I did, and fugh the begrudgers. [Ibid.] 168: See what you get, if you do fugh about.
1965		(con. 1940s) B. Behan Confessions 115: Young bastards of eighteen and nineteen [...] proceeded to use the cane on the veterans, or in one way or another generally fugh them about.