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US Military terminology: the act of pointing the barrel of a firearm at another member of the US Military. Used especially during close-combat situations and during training.
During basic rifle marksmanship in basic training, a private got tackled for flagging a drill sergeant.

When clearing rooms, you must pay close attention to your muzzle so as to not flag your buddy.
by PFC King August 31, 2005
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Jul 1 Word of the Day
sending two texts in a row without a reply inbetween.
Rachel: whats up?
Tessa: not to much! hbu?
Tessa: dude, i'm so bored.
Rachel: stop double texting me.
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2
To be a flagger. The act of flagging.
To say that you are going to do something and not do it. To get the reputation of being a flagger is not a good thing.

Yo man, i heard you're tryna get with that gerl, don't waste your time, shes a flagger. She's just going to lead you on.. and then move on.
OR

Yo broh, what happened last night? We were supposed to chill but you never picked up your phone. You were flagging nasty!
by Stephaney Patino May 06, 2008
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4
n. The act of wearing keys, colored handkerchiefs or other objects on the body to indicate sexual interests. Worn on left to indicate you're a bottom, on the right to indicate you're a top. There are several contradictory lists saying what each color code indicates. Mostly used in the gay male culture, and has branched out to lesbian and BDSM cultures, but may be dying out.
verb. to flag
He was flagging green, but I couldn't tell if it was hunter green or forrest green without my color chips.
by Peter November 23, 2003
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5
To have sexual intercourse with a person from a sovereign nation, recognized by the United Nations, thus laying claim to that person’s “flag.”
Did you get any flags on your backpacking trip?
Yeah, two flags: Spain and Germany.

Flagging also known as World Domination or Capture the Flag.
by Atlas Al September 18, 2009
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6
The advanced skill of holding your body horizontal while gripping on to a various pole. This activity requires great skill and stamina, but when done correctly, is totally amazing.
Fred: "Dude, you should go flag that street light pole."
Daryl: "Haha, yeah right. I don't have the core strength for flagging."
by Late-skeezy June 03, 2009
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