(adj) Something which arouses no interest at all.

Used to politely avoid admitting this, which indirectly expresses your indifference.

An overused word which says nothing at all and belittles conversation.

used for lack of a better word in a conversation. can express 1)indifference, 2)actual interest, or 3)kill time before having to actually respond with a complete sentence (each indicated by the user's tone and manner); excellent word choice option when you do not want the person you are talking to to be able to say something else.

pain in the ass, unpleasant, difficult, nuisance, difficult job, impossible job

What alex says every 12 minutes during a conversation to notify learning.

said when something really ISN'T interesting (said in a serious tone)
or when you don't know what else to say in a situation (said in a serious and kind of awkward tone)

When a fat girl sends you an e-mail from an online dating service and states you sound 'interisting' to boost her self-esteem because she messed up by pressing the wrong button, and felt awkward.