keep it up:

Defined by Captain Francis Grose in his Dictionary of the Vulgar Tongue (1811) as: ' To prolong a debauch . We kept it up finely last night; metaphor drawn from the game of shuttle-cock .'
See Also: Button your arse!, fluffer, FUBAR, grease the wheel, keptie, nailhead, ragmop, Snafu, sperm bank, tackhead, tough shit!, tough titties!, undercover punk, undercover sissy, up and down, ups and downs

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