A heart. It means, 3 words, 2 hearts, 1 love. Kind of the reverse of <123.
Her : Do you love me?
Him : No, I <321 you.
by JKABDFAB June 28, 2009
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Guy: Im gonna admin Guy3
Guy2: Don't admin him! He'll just pull a 321!
Guy3: No I won't, cry1 ccry2 emo.cut EMO.CUT
by Ina331 March 17, 2008
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Originating in Mankato Minnesota, Matt R was credited with the term. The term refers to nutting on someones face. While the word is known by only locals, "321 Up On It" has been found being used in day to day conversations.
Jeremy: That chick is a fucking cow, i wouldn't touch that with a if i was wearing a fucking astronaut suit.

Ben: Phhhh, I'd 321 Up On It...

Jeremy: That's buck nasty, why would you do that?

Ben: Spite.

by ThaMasta August 25, 2008
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321's ; means the runs, dyorea.
by Bryn Benn April 14, 2020
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If a song exists this rule states there also exists a dubstep remix of it
Eric: Hey joe! Did you hear rule britannia?
Joe: Yeah! Did you hear the dubstep version of it? #rule 321
by familyfriendly.xyz November 17, 2022
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