Favourite words - Do you have any fav words you use over and over again. I have a few that I truck out - more for the reaction they get than for any other reason:
Bozo - anyone who does anything that is a bit dumb - from silly through to just plain stupid.
Sucko - short for "sucked in." You were caught out, you ended up getting your "just desserts" etc.
Swag - a general purpose collective noun. eg: A swag of reporters, a swag of mail, a swag of students...
Magic - becasue I move in some very conservative circles, this is a nice word to raise hackles! I use it in the sense of unexpected or unexplainable.