Any form of 'activism' that you do while sitting on your ass. An attempt to feel like you're making a difference, but without making the effort to put clothes on and get off the couch.

Example: E-mailing a show's sponsors to demand that they stop advertising on that show.
I went to a town hall meeting and argued against a new policy; it was more meaningful than the asstivism that people on Facebook do.
by Maenadsattack September 22, 2015
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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
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The pulsating movements your dog’s anus makes when he or she is about to defecate.
Person A: Are you sure Max still needs to go?

Person B: Yes. He’s displaying a lot of “asstivity” back there. He’s going to poop any second now.
by Robert Sacamano November 18, 2020
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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
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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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The act of being a complete cunt to:

1) make a political point
2) start a political movement
Anna: Eugh, that cunt is making memes about how we run our community again
Lily: He says he's doing this "asstivism" shit
Anna: Fuck him
by supermegaukprizegifts March 07, 2017
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