1.The empty set is not the same thing as nothing; it is a set with nothing inside it. It's a mathmatical term.
2. The head of a stupid person.
2. The head of a stupid person.
by Sandi68 April 14, 2006
In middle management a person who thinks that they know what they are doing but in reality they have no clue of what is actually going on.
by Coop1964 September 17, 2015