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Grab a suitable shirt. Wear your shirt with pride (and an undershirt).
This method uses long, thin cuts and slices to give your shirt a drastic "destroyed" look. For this method, you'll want a t-shirt that you don't mind ruining. Preferably, the shirt should be solid-colored and bear no screen-printed design (screen prints can be tough and somewhat tricky to make clean cuts through). Congratulations - your shirt is ready to wear! Don't forget that this shirt exposes your midriff - if you're worried about breaking the dress code at your work or school, be sure to wear an undershirt!