Top Definition
A time period of 4 years used by albertan rednecks in referance to crop rotation which has been hickified into a a daily-quatro annual date marker

A bumleskum is retro active in that last bumbleskun happend 4 years ago and the next one will happen tomorow...4 years ago
I hant seen you in a bumbleskum i tell you what
by hillbillie lovin January 24, 2008
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