A person who is always acting crazy. Not always good crazy.
For example:
Random Girl 1: I hate her.
Random Girl 2: I know. She is so looners.

A looner happens when a girl is turned on. She get's a lady boner.

A loner and a loser at the same time

A person who is sexually aroused by balloons weather that be a hot women with little to no clothes on blowing them up until the pop, using their big ass to sit on them or just watching them blow it up slowly while their vagina hardens up each breath makes them wetter and wetter while the balloon expand with every breath breathing harder and harder till it pops and reaching orgasm