Top Definition
A prematurely rotund and often sagging backside due to sitting all day, everyday at your office desk job, possibly bored to narcolepsy. Sadly is likely to occur in otherwise physically fit and healthy young males/females.
" It's a real shame, she's an attractive girl, nice body- only in her twenties-but buttocks practically on the floor. Office bottomitus."
by missnicks May 21, 2012

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