Of course there's a difference between nerds and geeks. A nerd's defining characteristic is general smartness. A geek's is a deep and obsessive love of a specific subject. A nerd can be a geek when it comes to a certain topic, but not all geeks are nerds, and no one can be a geek about everything.
Alternate definitions, both originating from the 50's: 1.) A bald man. 2.) A supporter of Democrat Adlai Stevenson, who received the Democratic Party's nomination for president in 1952 and 1956. He was defeated both times by Republican Dwight Eisenhower.
They are: "vote for", "elect", "support", "cast your ballot for","X for Congress", "vote against", "defeat", and "reject". The Supreme Court says they cannot be used in third-party funded political issue ads.