Tequila Shot

Listen up, buttercup. This joke is saying that people are like tequila glasses, meaning you should "shoot them down fast". Which means you need to take them down a notch, QUICK! It's funny because who wants to think of people as tequila glasses that need to be shot down? Nobody, that's who. Also, you should always shoot your shot, and you should probably get some friends too, loser.