'Mostly Harmless' means something more than not harmless.
My dog is Mostly Harmless, it probably won't bite you.
by atatakaiz May 2, 2019
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Someone who's a degenerate that fucks his sister.
Person 1: I held hand with my sister
Person 2: You're a harmless alt
by s3npaizuri May 16, 2020
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Words that seem innocent and harmless but are not.
Friend 1: Hey! go to urbandictionary and search for alabama hotpocket and angry dragon!

Friend 2: lol, k. Those are seemingly harmless words.

Friend 2: OH GOD.
by chairman_meow October 15, 2008
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1) Something that cannot provoke harm.
2) The definition of earth on the Hitchiker's Guide To The Galaxy before the update. See Mostly Harmless
1) That little bird is harmless
2) Earth was defined as "Harmless"
by 21GgBoi January 20, 2018
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One that acts tough but goes to tears when called out.
One that is built like a hobbit and drives around in a second hand Maserati doing burn outs but once locked up for his/her actions will need a bucket to mop up their tears.

When the old ladies feel unsettled around the burn outs, their husband's kindly say, "don't worry hun, he's harmless."
by The harmless hobbit June 17, 2021
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Adjective
harm·less
Pronunciation:
/slət ho͞o trī stēl mī ˈdadē/
A adjective use to describe a female who is trying to take a Daddy who is not her own and is already taken by an amazing, hot and kawaii af Babydoll.
"She is harmless"
-Clueless Daddy.
by BabydollsAgainstDaddyThieves September 17, 2018
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