When someone has many long pubic hairs and decides to tie them to their gooch or taint hairs, this forms a hair thong.
Other ways to say this includes bush panty or pube thong.
To stay a virgin until marriage I will tie myself a hair thong to literally cock block.
Dude I’m tired of people pantsing me, so now I will grow out a bush panty so people won’t see my genitals next time a chad tries to pantsed me.
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