Top Definition
Any activity that can be performed while sitting on ones ass. ie - channel surfing, couch potatoing, video gaming.
That "Gilligan's Island" marathon was one serious asstivity.
by Michael T Adams March 06, 2008
2 more definitions
Any activity that can be performed while sitting on ones ass. ie - channel surfing, couch potatoing, video gaming.
That "Gilligan's Island" marathon was one serious asstivity.
by Michael T Adams March 06, 2008
n (ass-tiv-it-y) - Any activity that can be performed while sitting on ones ass. ie - channel surfing, couch potatoing, video gaming.
That "Gilligan's Island" marathon was one serious asstivity!
by Michael T Adams March 07, 2008

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