This is a pound sign or number sign. Short for pounds avoirdupois. Not to be confused with the incorrect word "hashtag" which most dumbasses go by. The symbol is defined in Unicode as U+0023 # or British currency symbol "£"
Your dumb if you use "#" as a hashtag. Makes not damn sense. You cant smoke it. It doesn't go on clothing.
by thesatisfyer January 20, 2015
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A written symbol for the term "waffle" meaning one who has homo-sexual tendencies or is prone to homo-sexual actions; Represented through hand gestures by placing two fingers of one hand (as in a peace sign gesture) in one orientation and placing two fingers of the other hand behind the first hand and oriented perpendicular to the first hand, thus forming a visually analogous hash mark with the hands;
"Mike Grinnon used to try and pick up chicks at Lupo's by saying he played basketball, that kid's such a #waffle#."

"Dude, #waffle# rule in full effect"

"#WAFFLE#, #WAFFLE#, #WAFFLE#!" (in a berating chant)
by Rajmahal33 April 3, 2008
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#
#
by co5oo March 11, 2019
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A “#”, when used at the end of a sentence, means that the sentence should be ready with sarcasm or general jokiness.
Your four AM calls are not at all annoying#
by Artemis47 May 31, 2022
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The best way to avoid people asking you for money in video games
Guy 1: Ayo you promised me 1,0000,000 robux
Guy 2:## # #####
Guy 1: give me the robux now
Guy 2: ## ############
Guy 1: caps
Guy 2: ###
Guy 1: turn caps off
Guy 2: ##
Guy 1: I quit
-guy 1 left the game-
Guy 2: gotem
by DaAnberled April 12, 2022
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The symbol for Hashtags, everyone knows this!
by ##hash## May 30, 2020
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