Someone who runs from indoor location to indoor location due to the fact they're wearing a t-shirt in sub-zero weather.
This is a Canadian phenomenon that tends to occur in spring and fall. Due to uncertainty of the weather and the fact most Canadians like to act immune to cold, The Short Sleeve Hustle is often witnessed.
"Tom is such a dumbass. He didn't even bring a coat."
"Yeah, looks like he'll be doing the short sleeve hustle."