It probably means he wants him to see what's under his shirt.
He's a shirt lifter.
A heavy frame with a lifting mast and forks in front
He wasn't paying attention the last time his trousers were down.
it means he's itching or showing off.
yes it does. this boy is either really annoying and perverted or he just really likes you
If a girl keeps staring at your belly button, it must mean you're not wearing a shirt or it's unbuttoned. It could also mean she likes you.
Simple, it just means that she trusts you and knows you are not a pervert. after all she is just changing her shirt!
That he's to chicken to flaunt in front of you in person or he's hiding his flaunting from someone else.
It means shes a tramp. To be polite.
Well they're either a d**khead, or they still fancy you.
It could mean he is getting an erection, or his clothes are uncomfortable, just like when a girl adjusts her bra.
My homework shirt? My working shirt? It depends on what you mean.