A 24oz can of beer. Also known as a "tall boy"

A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.

"Tall can" refers to a 16oz can of beer. Usually PBR (Pabst Blue Ribbon)

Has absolutely nothing to do with the middle finger.

1) Term used to describe or acknowledge any female you would not associate with under normal conditions.

2) Term used during social gatherings to rate female attendees.

To give someone the finger. To show someone your "Tall Can" is to stick your middle finger up at them, implying "Fuck Off"

Probably best known from Transplants - Tall Cans In The Air