When you go to your dealer for a bag of weed and you get NO BUDS. It's all shake & seeds.
I can sell ya some weed but all I got are these 'sandbags'. No buds.
by Dabnis January 26, 2011
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When someone remembers all of your mistakes, almost like picking up grains of sand and putting them in the bag. Then when they want to put people against you, they remind you of all of their mistakes, as if they were hitting you with the bag of sand.
Sheila: Shelly you're so full of crap.

Shelly: says the one who got mad at me on my birthday two years ago.
Sheila: what does that have to do with anything. Stop sandbagging me.
by Mlimbach610 August 4, 2016
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In Sales; the act of intentionally holding back deals till the next month to get off to a fast start. Stems from the belief that you can't perform to a high level without a competitive advantage. See also: Mental Weakness.
"Can you believe Jeff is sandbagging 72 deals so he can make May's numbers look better?"
by Lyle Carson May 1, 2016
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The act of sexual intercourse with a quadraplegic amputee, (person without arms and legs), thus being reminiscent of humping a sandbag.
Person 1: Yo, boy's just hooked up with that quad chick.

Person 2: Yeah, he'll be sandbagging tonight!
by Itchy Nitch April 3, 2011
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V. In roller coaster operation:
To delay the dispatch of a train for as long as possible without causing a cascade effect. Usually done after adding and empty train after it has been at rest.

A fresh train will not move as fast because the wheels are cold and need to move to generate the friction required for maximum speed. For this reason the "hot" fully loaded train behind it may catch up to it during the ride. different types of Coasters require some trains to be sandbagged more than once to allow for the preceding unit to achieve maximum velocity.
The new kid forgot to sandbag the train on main, now it's stuck in safety 1, and the lead has to supervise adding the fifth train for EVERYONE.

Thunder Mountain only requires a train to be sandbagged once, while Space Mountain may require a "rocket" to be sandbagged up to three times.
by carrg September 6, 2007
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Somebody lies down. Another person squats over that person's face. The person squatting then poos in the mouth of the person lying down. They then eat that poo
by FronkyDonkey E.F September 1, 2017
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When someone talks almost endlessly about their past military experiences, including historical facts, anecdotes and tales of buffoonery. It is possible to be caught in a conversation with a group of sandbaggers, this can be a dangerously boring situation, difficult to get away from and should be avoided by civilians at all costs.
Tony: "Tim, did I ever tell you about the Naval Commander that invented the jubilee clip?"

Tim: "What the f**k has that got to do with anything? Don't start sandbagging!"
by xpanda1982 June 22, 2011
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