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2.
It's a triangle. Widely used by "hipsters" on tumblr and other blogging sites.
"▲"
"I'm so hipster because I like ▲"
by ValCastaneda May 02, 2010
 
1.
Dude--it's a triangle. Whaddya want?

This is an Alt Code, only on PCs. Take THAT, Steve Jobs! WE have Alt Codes!!!
▲ is usually a symbol used to define mountainous terrain on a map.
by TheUrbanWebster February 19, 2009
 
3.
triangle.Duh!

▲ ▲ triforce! ▲
by 19995959595 January 30, 2009