A tank
top a male (usually a gorilla) wears to the gym with the sleeves completely cut out. One can see a gorilla's pecs, six pack, and pretty much everything. It leaves nothing up to imagination. This is why the tank is referred to as "slutty", because it is the male equivalent of the skank tank.
This tank is also referred to as a "
cali tank" or "muscle tank" and only the buffest
men receive the honor of wearing it to the gym without criticism.
Sometimes, it is assumed that
men wear this gym tank because their arms are too
big to fit in normal tee shirts and
may rip the sleeves when benching 500 lbs. This is usually true.