What does alien psycho sister mean?

alien psycho sister meaning in Urban Dictionary

Any extraterrestrial, most likely with a few amount of insanity and/or psychotic inclinations, that presents due to the fact sis of every legitimate individual. Might give off, at any amount, the immediate following: doggy vocals, shrill noises, nonsensical terms, abrupt shouts, reduced hissing sounds, exceedingly bad whistling, or any other strange noises.