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1.
1.) when you don't know if you've done something accidentally or intentionally.

2.) When you do something accidentally but agree with the outcome.

3) When, following an accident, you are not sure whether the action was deliberate on part of your subconscious.
"You know that teacher who failed me in College because I was 3 seconds late after the bell?"
"Yeah?"
"I crashed into the car he had parked out on the street."
"Did you do it accidentally?"
"I think I did it accintentially."
by wcoltd February 25, 2014

Words related to accintentially

accidentally confusion intentionally oops? uncertain