1)Where a person of short stature believes they have the ability to take on any person at any task. It is a general cockiness that is in a short person to replace the lack of height. Beware of anyone with short man syndrome.
2)When someone who is short gets an unfair natural advantage in some type of physical activity i.e. running, stretching, squating, benching, etc.
1)Guy 1 "Man why is Matt so aggressive towards me?"
Guy 2 "Because dude he has short man syndrome"
2)Guy 1 "I don't get why that guy can squat so much and run so fast."
Guy 2 "Well just look at him he has short man syndrome."