by Poohbear's cousin May 30, 2012

A shirt thing is a lame ass t-shirt that douche bros wear to the gym. You make one by taking the following steps..
1) cut off both sleeves and your penis
2) cut from the arm pit down to the base of the t-shirt 1/2 inch from the base
3) enjoy new shirt at the gym
1) cut off both sleeves and your penis
2) cut from the arm pit down to the base of the t-shirt 1/2 inch from the base
3) enjoy new shirt at the gym
by Strike itch April 6, 2019

A gym shirt with the sleeves cut-off creating large arm holes often encompassing much of the side down to the abdomen. In many cases, this includes exposing the nipple. Worn by tough men lifting weights.
Man, this casey shirt is awesome. It really lets my pecs breathe.
I can't believe they wore their casey shirts to the meeting. How unprofessional.
I can't believe they wore their casey shirts to the meeting. How unprofessional.
by the_office_oracle April 16, 2009

A gentleman's shirt, typically his most expensive and alluring, which is saved for occasions when he so wishes to maximise his chances of partaking of sexual intercourse with a woman.
Me: "Hey Dave, think you might score tonight?"
Dave: "Definitely. I do have my riding shirt on in all fairness, I'm guaranteed to hook up"
Dave: "Definitely. I do have my riding shirt on in all fairness, I'm guaranteed to hook up"
by mavrick1579 March 17, 2011

by Trevor Hay February 19, 2009

by Allaiyah June 24, 2004

by *jocelyn* July 21, 2005
