Fuck this for a game of soldiers!

Historically soldiers were notorious for becoming engaged in silly and most times (e.g. the game of the "bisquit") non-sense games to kill the time, practice that over time gave them a poorly credible connotation and stereotype. Hence this old fashioned colloquialism (the original version was Sod this for a game of soldiers) compares the foolishness of a certain action/thing with that of "a game of soldiers"

A strange English expression of resignation. I don't know the etymology, though. It really is quite bizarre.

A term used by a peson meaning that in no uncertain terms would they do whatever the task in hand might be!

English phrase in an undesirable situation often used in resignation or denial. Translates as the American goddammit or fuck this. Common in Belfast as "game of soldiers" but in England is interchangeable with "Bugger this for a lark".