unishirt Share definition Flag One shirt which appears to be two or more layers of clothing. (e.g. an attached collard-shirt/vest combo) "I complimented Sue on her vest, but it turned out to be a unishirt!" unishirt by Okerlund November 23, 2009 0 0 Get merch Get the unishirt mug. Buy Now — $32.95 See more merch
