A snowy owl is usually carried out by means of bluff, bald-faced lie or, in the case of physical deception, photoshop.
The origin of the term "snowy owl" is rather complex. In brief, "owl" is used here as a somewhat archaic synonym for "coin", whereas "snowy" alludes to the weather conditions one has to deal with during a blizzard, specifically the poor range of visibility one has to endure while driving. "Snowy owl" thus indicates a counterfeit, a coin (individual) of uncertain or dubious value.
2) I paid five dollars for this online psychic reading, but ended up getting a snowy owl. That so-called "psychic" didn't know what the hell she was doing!
3) I meant some supposed "medium" in a occult chatroom left night, but it's pretty obvious to me that the only spirit she can channel is a snowy owl spirit.