Expressions in Tim Minchin's "Cont."

In his song "Cont.", Tim Minchin uses two expressions I cannot find in a dictionary: http://www.youtube.com/watch?v=UmTexiEZmL8

Can somebody explain the meanings?

  1. "..., who lean on their horn..." (5:34)
  2. "talk camply" (6:04)

To "lean on your horn" is to sound your car horn, usually aggressively.

"Camp" in this context means "effeminate". To "talk camply" is to talk in an effeminate manner.