Mackerting is the art of wearing a shirt one size too small. While more often then not this shirt will be collarless and will feature a v-shaped neck, Mackerting is not limited to v-necks. It is possible to Mackert in any type of shirt including, but not limited to: t-shirts, polos, button-downs, soccer shirts, basketball jerseys, and henleys.
Dude, is Jake juicing? His arms got huge overnight.
Naw, bro, he's just Mackerting; it's an optical illusion.
by RADa5AURU5 December 10, 2010

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