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1.
The state of being naked from the waste up. Not wearing any form of clothing on the chest. Generally practiced only among males.
It is common to go shirtless at the beach.
by L_TS September 23, 2009
 
2.
Something that should be seen more often in warmer weather.
Person 1: "That person is always shirtless! Does he own a shirt?"
Person 2: "He likes being shirtless. Just let him be."
by DW!! July 13, 2013