Dictionaries:

clean it up:

Or: clean-up / butch-it-up , a warning or admonition, between gay men, to affect a more manly comportment when the situation warrants it as in the presence of strangers or when homophobic bullies are lurking about.
See Also: cleaning your fingers, FUBAR, Snafu, tough shit!, tough titties!, up and down, ups and downs, Veronica's veil, wash the egg out

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