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Not mandatory; A decision can be made in this situation.
Watching TV is more often than not optional.
by Herman D. Optional July 31, 2004
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Jun 16 Word of the Day
Abbreviation for “Dude Arguing Online”.

Plural: “DAOs”

Coined by Twitter user @karakittel.
Would the internet exist without DAOs? Sadly, I don’t think so.
via giphy
by monkeylabor June 13, 2021
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Fuck OWL!

At Vanderbilt, optional means NOT OPTIONAL and not optional means NOT OPTIONAL (aka required).
1) Check your OWL grade because you just got screwed because you didn't do the OPTIONALS!
by Chemisty's bitch (beau-neur) December 12, 2004
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