To do something amazingly dumb in an attempt to be funny
Bill: I wish I could make that hot chick laugh
Jack: Why don't you just do a Harry
Bill: Why not
(Bill jumps over a wall landing on his head)
Hot Chick: Thats funny lets get it on
by Kevin Hosford February 15, 2008
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Rhyming slang for 'Do the bolt' ie get away post haste from an unenviable situation.

The use of 'Harry' is derived from Harold Holt, a former Australian Prime Minister.
Quick! The cops are coming! Let's fucking do the harry.
by Mordechai Vanunu August 24, 2007
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Trying to barricade a doorway while preparation phase is over and dying to a rusher in Rainbow Six Siege
Oh damn you just did a Harry

Oh no I think Im doing a Harry right now
by TotallyNotHarry October 19, 2019
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Where you talk on a video call while you've muted yourself, like a classic Harry.
Harry: ...
Anyone else: "You're doing a Harry. Unmute yourself."
by TLJOMG June 9, 2021
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Leaving the girl you have a crush on to your best friend for instead being able to make out with his sister.
A: "Did your hear that John is now dating Ryan's sister?"
B: "Well, Ryan is in a relationship with the girl John had a crush on, so I assume John was doing a Harry Potter."
by Bundesandler September 9, 2018
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Mid-masturbation with cats loose in your home, proceed to finish while said cat/s run through your legs, covering their fur in semen.
Person 1: I was at a party last night and I stroked the host's cat, but I met an unwelcome surprise as it seemed that someone had been careless enough to do a Harry, so needless to say I had to clean myself up with my tongue, in a cat-like fashion.

Person 2: Wow, you skirrowed it there mate.
by rentboythrowaway September 5, 2017
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To con somebody by taking an average product and pretend it's premium so you can apply a premium
Counter chick: " we need 1 large chillimcchillison pizza with extra chilli, but we don't have any chilli"

Cook dude: "All G surely I can just do a Harry on em from the place down the road"

Counter chick: "Nah no can do Sam will know, Jordie is coming in later though con him"

Cook dude: "Aight bet"

Counter chick: "Oh and stop calling me Shirley"
by Slam1554 July 28, 2023
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