The comforting action of pinching a shirt slightly above the belly button area, extending the arm and quickly releasing. This action is done subconsciously by many to provide a euphoric feeling of comfort and relief. The shirt-pull has gone mildly unnoticed for several years but spotting a shirt-pull has now become a national pastime as many have discovered the delight and joy of identifying

somebody mid-shirtpull.
*When correctly identifying a shirt-pull, it is crucial to "chalk-one-up", in order to correctly keep a mental tally.

When someone goes to the gym and spends 90% of the time on their phones scrolling through social media

The pulling of the shirt, near the chest area, making a gap and losening any tightness. This might often be done by transmen or transmasculine poeple in order to relieve chest dysphoria, or in order to indicate to others who know the sign that they are trans.