The word "
loony" comes from the retarded superstition that staring at the moon will make you batshit crazy. It can mean one of 2 things:
1)Someone who disagrees with you, and who you do not wish to speak to or listen to. This term can be used by nancy boys and douchebags such as
fundies, generally to refer to
lib'rals.
2)Someone who is demonstrably delusional or psychotic. Often these people will disguise their psychosis as a political ideology, generally blaming various groups of scapegoats for all their problems based on negligible or nonexistent evidence.