Horse Pumped

To get fucked hard or fucked over .

Your boss just horse pumped you for your pay raise...what a prick

I just horse pumped this bitch, my nuts are drained.

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pulling a pump horse

betraying someone like an absolute dick and leave them to die

"Don't you dare pull a pump horse on me after this robbery!" - somebody I don't know some idiot dumbass who died because of his friend pulling a pump horse on him