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1.
A replacement for the hash-tag (#) used to mark irony or to otherwise prevent the tagged statement from trending on social media sites.
"I just dropped my new phone in the garbage disposal. %ObamasAmerica"
"Didn't you mean to say #ObamasAmerica?"
"Nope. That's a percentag."
by KaiserWilhelm December 30, 2013
 
2.
A symbol to replace the hashtag on twitter. To be used just the same as a hashtag on Twitter, but is the new, 2.0 version.

Hashtags aren't going to be around forever. They are getting used up. So intro to the %percentag
I like using percentag %winning
by Dano Hart May 18, 2011