Sots are people who drink too much alcohol and are often drunk.
Being called a sot is not a good thing.
Examples:
He is a sot and he can't walk straight.
The sot fell asleep at the bar.
The sot drinks too much and makes bad choices.
The sot tried to dance but fell over.
The sot drinks so much, he can't even talk.
The sot is always at the bar, even when it's closed.