pump and dump

Assimilation of a lot of information and forgetting it as soon as the necessity for learning it is over. Originates from filling the fuel tanks of an aircraft, taking off, and then immediately dumping the fuel prior to landing in order to (1) train using the dump valve, (2) use up the squadron's allocation of fuel so that the allocation will not be reduced the next year (especially popular at the end of the fiscal year), and (3) ensure a safe landing (most aircraft cannot safely land full of fuel).

I will have to pump and dump for the engineering exam next week, since I have a multi-d final two days later.

We have to go through 500,000 pounds of fuel in the three days before October 1. It looks like we'll be flying nothing but pump and dumps.

by Navyd October 18, 2008

pump and dump

station designed only for gasoline, taking shits in the bathroom, and nothing else (not even peeing)

"Where's the nearest pump and dump, I need to poop and I'm on empty"

by Dick Sunshine August 23, 2006

Pump and Dump

When you and your girl are banging and midway have to poop. So you are sitting on the toilet in missionary, pooping together. The Pump and dump.

Last night Cindy and I were so drunk after B Dubs, we had to Pump and Dump afterwards.

by Catastrophic ASS Blaster July 30, 2016

Pump N Dump

Another way to describe pulling out during sexual intercourse.

I took a girl home last night who wasn't on the pill so I had to do the ole pump n dump on her back.

by The Real Wiz 76 July 16, 2016

25 pump and dump

When having sex with a girl missionary style, you pump 25 times, dump your vomit, then run.

Yesterday i was 25 pump and dumping on this girl and now i think she hates me.

by Logofresh May 27, 2016

pump n' dump

The act of using a giant fleshlight while simultaneously taking a monumental bowel movement

Alright fine, I'll play some Mario Party. Just let me go pump n' dump first

by koonmagic November 30, 2010

Pump 'n Dump

n. The act of masturbating in a gas station bathroom while defecating.

Steve: "Dude, pull over at this gas station. It's urgent."
Jeff: "Why?"
Steve: "I need to take a Pump 'n Dump. Bad."
Jeff: "A what?"
Steve: "Look it up."
Jeff: (searches Urban Dictionary) "Oh my god that is horrifying. People do this?"

by PriceIsRight November 24, 2013