Pump shark 

one who goes to the gym to talk rather than work out. A pump shark will continually walk up to people who he/she senses are have a good work out. The shark will then stroll up to that person and talk their ear off until they have effectively taken away the persons pump, hereby killing that persons workout for the day.

jake: Im going to get a great pump in today!! I can't wait to get to the gym and get my swoll on. You wanna go around 3?

Timmy: Man, if you want a get a good work out you better put your head phones on and stay away from that fuckin pump shark thats always there around that time.

Jake: Fuck that lets just go to the other gym so we don't run into that guy

Pump shark by Nuke85 November 7, 2010

pump bandit 

Someone who drives away without paying for their gas. Some try to claim it's a form of social justice because "the oil companies are ripping us off." Basically it's stealing from the guy who owns the local gas station.

Thanks to the pump bandits you now have to prepay all the time.

pump bandit by knowman April 22, 2008

pump the brakes 

to tell someone to slow down when trying to jump conclusions about someone or something; to slow your role; to caution another concerning any particular matter

Kenny, Pump the brakes, you are lying she did not steal your car!

pump the brakes by Freerl February 23, 2008

pump slugs

To shoot (bullets) at or into a person.

If I ain't get my loot by Wednesday I'ma start to pump slugs at ya dome.

pump slugs by mVal September 14, 2006

pump some iron 

To workout your muscles.

C'mon let's go to the gym and 'pump some iron'!

pump some iron by CRAV February 14, 2014

Pump and Hump 

When a woman's breast milk is used as a sexual lubricant.

"My wife is still breastfeeding, so I asked if she was down for a pump and hump."

Pump and Hump by Fappus the Bold April 10, 2009

pump and dump 

Having sex with a woman one time and then never talking to them again

Boi Mike pulled an epic pump and dump with that girl from the bar

pump and dump by sully224 December 5, 2016