Someone who prevents you or a friend from taking a shot of liquor.
Cock blocking with alcohol instead of pussy.
"I bought Sam a shot of tequilla but he couldn't drink it cuz his girl was trippin and being a shot blocker."
A person who blocks someone from throwing a pwadded up piece of trash into a waste basket as if it were a basketball.
He shoots and he..." "Rejected!" "Damn you Greg! You f*cking shot blocker!