The wide circle which forms around the moon when tiny hexagonal ice crystals surround and reflect the light from the moon. A family of European sheep stealers (we can only assume the sheep were taken for matters of sexual gratification) coined the expression "McFarland's Halo" as they belived that this occurance granted them the best night light by which to steal sheep.
It's a McFarland's Halo tonight.
by Bendall August 04, 2008
The Urban Dictionary Mug
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