1. an even whatever-er way to say whatever, as you don't care enough to use more than one syllable.
2. something to say when youre in a hurry or don't know what to say.
3. a verbal shrug.
4. a way to avoid conversation/annoy your parents, except less expected than "I like pie
5. a general way to show unexcitedness, reluctance, or indifference.