Moishe Pupik

A guy who walks around acting like he is a big deal or someone who knows what they are talking about but he is just a huge nothing.

Who is this Moishe Pupik running around talking to everyone like he owns the place. ?

Barrel of monkeys

Could be a fun person. Mostly used sarcastically to describe a boring person or group of people.

Going to Warren's birthday party. I am sure it will be a barrel of monkeys there