This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. Slang A robbery, especially at gunpoint.

n. A robbery at gunpoint

n. A small diameter tree branch or limb that extends out of the water in flooded or submerged timber, as in a lake or river.

n. robbery at gunpoint

"The stickup was the second grab-and-run heist in Sin City in two months."

robbery   

stick up   

current-day    drug-dealing    tax-collecting    teenagers'    andher    stick-up    predacious    landbound    pop/rock    quick-draw