Taking the day off work (when others have managed to make it in) as a result of an incredibly light dusting of snow on the ground. Made popular in the U.K. as a result of hysteria from ‘yellow’ warnings broadcast by the BBC.
Louis: “Where’s Gavin?”

Stuart: “He’s having a Mason Day”

Louis: “But it’s not snowing!?”

Stuart: “.....”
by rdjm01 March 29, 2018
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On the day, August 30, any person name Mason is to be bullied.
Chad: Hey you know what today is?
Jeremiah Smith III: Hell yeah, National Bully Mason Day.
by Shazala August 30, 2019
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You bully people named mason because they cant date women
Cant wait for national bully mason day: the prelude on February 22nd!
by J@$H February 18, 2022
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