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!. To be slapped by a clown, usually (but not restricted to) of Ronald McDonald's appearance.

2. To be bitch slapped by a McDonald's employee.

3. To strike someone in order to steal their fast food meal.
1. I tried to give that clown over there a hug, but I guess he was in a bad mood. I got McSlapped!

2a. I didn't want fries with my meal, and the dude behind the counter McSlapped me! So much for "We love to see you smile, huh?"

2b.I swear to God, I'm going to McSlap that customer if he asks me one more time if I want the Happy Meal in his pants.

3. Person 1: "...So then I came into this clearing and saw a family eating some fast food at the Picnic Benches."
Person 2: "So what did you do?"
Person 1: "Well I was so hungry, I snuck up behind the guy, McSlapped him hard, and ran away with his Big Mac and Fries. It was so worth it."
McSlap by A Fizzle Dizzle August 20, 2008
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mcslappy 

A named used to call an Irish man and/or woman that enjoys slapping.
Watch out for that mcslappy!
mcslappy by fdsiolsfk January 3, 2008

Happy McSlappy

A troll on the internet who has deemed himself "Lord Internet". He can often be found on Facebook and Xbox live. Is known for pissing off everyone and taking pride in being an asshole.
Facebook girl: Happy McSlappy won't stop trolling my Justin Bieber Statuses!
Guy: That's because you deserve to be trolled by Lord Internet for liking Justin Bieber lol
Happy McSlappy by Awesomesauce1966 September 6, 2012
!. To be slapped by a clown, usually (but not restricted to) of McDonald's appearance.

2. To be bitch slapped by a McDonald's employee.
1. I tried to give that clown over there a hug, but I guess he was in a bad mood. I got McSlapped!

2. I didn't want fries with my meal, and the dude behind the counter McSlapped me! So much for "We love to see you smile, huh?"
McSlap by A Fizzle Dizzle September 30, 2008

megan mcslay 

one who dislikes capital letters or punctuation. personification of awesome. certainly not a tory as she has never shopped at Waitrose and owns no ipads. Daughter of Father Macdonald
oy, this is an exam, don’t be such a megan mcslay. get some capital letters in your sentences
megan mcslay by LomeBands July 9, 2023

mcslappin 

A friendly tap with ur hand or ur thong when someone is asking for it
Mate if u keep tickling me I’ll give u a McSlappin
mcslappin by Hey bitch what’s up November 3, 2018
When you're in Burger King and you get your Big Mac stolen after you get mixed slapped my mother f***** with a Nike flip flop
Boy!!!!... that n**** had me all f***** up I caught that pimp trying to slide my girl a Big Mac so I had to make mcslapp the motherfuker!!!
mcslapp by Moonbuster1942 March 27, 2021