"whatever" What is this?

Do you use often use term "whatever" in your day to day communication. If Yes? Beware!
In my book it shows following things in you:

• You are ignorant about the subject you are talking about.
• You don't want to recall what exactly this "whatever" is.
• You really don't know the stuff to be substituted for this "whatever".
• You just want to skip and jump talking about something else because of any one of the three reasons above.