Top definition
Someone who gives others hand-jobs.

An insult.
If john pumps neds cock two days after bob has gotten his cock pumped by john 4 days after bobby had his cock pumped by shirley who was the first to pump dannys cock who then shot shirley and raped her dead body.

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Horatio called Lenny a cock-pumper for jizzing on his tooth-brush.
by BlackCloud March 02, 2004
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