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1.
A montage (usually in Call of Duty: Modern Warfare 2) that is made by two people acting in tandem by putting together gameplay clips, often of sick quick scopes or no scopes.
MW2 Player: Have you seen the new dualtage from Muzzafuzza and Fuzzamuzza?

Random dude: What the fuck is a dualtage, an STI or something?

MW2: You faggot hardscoper.
by The Wyte Man/ScopeSupremacy March 24, 2011