Bueller

[Justin Bieber]

A reference to the movie Ferris Buellers Day Off

Used as filler when nobody responds to a question or statement.

[Tanya Shivari]

someone, usually a friend that misses out on class ocasionally.

[Tina]

From the title character in the classic movie Ferris Buellers Day Off.

To take time off work, in an unauthorised and if possible un-noticed way.

Most commonly to leave work for lunch with a few close friends and not come back.