A haircut in which the upper part of the head resembles the top of a mushroom while the rest of the haircut appears normal. It is most common on homosexuals and guys who need better barbers. Often results in the person being called a shroom.
Ariana: Wow Robbie check out Ruels hair it looks like a mushroom!
Robbie: Thats called a shroom cut.
Ariana: What a homo let's call him shroom!