Overly excited about a simple thing; excited about something that most people would not find exciting.

when someone is under the influence of marijuana or just laughin way too much for no reason

Under the influence of crack cocaine

Usually used when girls are over-excited or giggly over a boy.

The people you pick on in high school and wind up working for as an adult

One who passionately engages in one or more things to extreme levels. A commonly ascribed term to people in the field of computer programming, but one does not have to be in a technical field to be a geek. The only criteria is an intense level of interest in something, often to a highly specialized degree.

The term currently seems to be most used when referring to various fandoms. Whatever you do, never mention the Endor Holocaust to a group of Star Wars geeks. It will become amazingly convoluted.

To be excited about someone; To get this unexplainable feeling about someone when you do anything that has to deal with them