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1.
Originating in Mercer Island, WA in 2012, the term 'dope metal rider' is slang for something that is perceived to be cool to the speaker. However, it is also used to ironically refer to uncool things.
Normal: Avengers is totally dope metal rider.

Ironic: Man, that pimper skater over there is so dope metal rider, bro.
by NFAC May 26, 2012