Sentence enhancer used to show nonchalantness, it is usually placed at the end of a sentence.
Hey, sexy lady, would you like to catch a movie later on or whatever?
Alright, give me a call later on or whatever.
Or Whatever: Two words tacked on, often needlessly, to the end of a sentence when you feel you need to say something more/the sentence you just spoke was rather idiotic, but can't think of anything off the top of your head to say.
Hey, your jacket is, like, really pink or whatever.