1)Generally refers to expensive liquor kept in a
liquor store behind the counter on the top shelf so no one can
rip it off.
2) can also be used to describe anything that is made up of prime ingredients:
marajuana, pussy, hardware, anything really.
1) These
margaritas are made with top shelf tequila!
2) A: This is the best weed I have ever smoked!
B: I was saving it for a
rainy day,
straight off the top shelf.