To be caught off guard with an insult or a belittling comment. To be blindsighted by a patronizing comment amidst a circle of friends, usually by one of your own friends.
We were out at a restaurant last night, and Peter totally sandbagged me with his comment on how easy it was to stop smoking, while it is obvious that I've had many failed attempts
by The Craziest Jackson December 19, 2006
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When making a sale during the week but purposely not booking it on the computer until the Friday so you don't need to go in to work.
"Dan has been sandbagging and has got a deal on Thursday and won't book the sale till Friday and can now enjoy a long weekend"
by doorbasher February 19, 2014
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someone who slows you down either by their pure retardedness or by their unwillingness to cooperate.
Jason: Hey Joe! Quit being a sandbag and get your ass in the car before i come woop your ass!
by Auneeezy October 10, 2005
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When you're tricked into doing something because you weren't given all of the information you needed to make a good decision.
Naris sandbagged me when he asked me to cover for him while he went on vacation. He knew he was quitting as soon as he got back and I'd get stuck with a matter that was a freakin' disaster.
by Victim or the crime July 4, 2012
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Knocked down or bowled over by a nasty or disparaging comment from someone you thought you could trust, with damage to your reputation or prospects.

Here’s the image: Two or more friends are tossing light objects to one another, and you get used to catching them easily. But then your “friend” tosses you a heavy sandbag, propelled with some force. You try to catch it, but it’s way more than you expected, and it knocks you flat on your back. You feel like a fool for being knocked over and for trusting that person in the first place.
Example: I thought I was OK with him - I even thought we were friends - but then he sandbagged me with a nasty comment, in front of people who are important to me.
by Getting_More_Cynical October 24, 2011
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When you work in sales, you don't post your production till the next day or the following month when you're toward the end of the month, to get a head start on everyone else in your office.
Me: Sam, I got 4 deals sandbagged for next month, I'm gonna beat everyone next month.
Sam: sand-bagger, I'll still beat you in production.
Me: good luck trying to catch up to me dude.
by K aka chris October 30, 2010
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The act of embarrassing someone by making them look foolish or stupid in front of a large group of people.

Usually it is unintentional or by accident. it can either be a dick move or the person is completely overreacting

first coined in the robot chicken star wars
BJ- (to a group of females) Yeah i'm the vocal coach for the band. I taught them everything they know.
Jay- no you're not dude, aren't you a janitor?
BJ- why did you have to sandbag me in front of those girls man? i was gonna get some!
Jay-what are you talking about? what does "sandbag" even mean? they were out of your league anyway
BJ- You're a total sandbagger man...
by T. Press January 22, 2010
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