To engage in sexual intercourse
That girls is so fine, I would love to sling one up her!
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The phrase "sling one up me" is used be drunken females from a working class background when discussing a fit bloke.
Not often used in the work place this phrase is used between groups of females as a euphemism for sexual intercourse.
Marie: "Look at him, I would let him sling one up me!"
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"brev, shes fit! why don't you sling one up the back of she"
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