This is when someone is very fat, but just casually roams around with no shirt. This is typically a male of Latino descent when playing video games. To wear a Mexican Shirt is to wear no shirt at all and the only layer of protection is body fat.
Look at Aidan! He's rocking that Mexican Shirt lifestyle while playing Rainbow Six Siege! What a chubby guy!
by Pulsar Plays November 21, 2019
by dankrab March 22, 2008