When you play paddy cake with someone, and then "paddy cake" (hit) them really hard with the intent to harm them with either violence or as a friendly gesture, or to knock them away as a way to harm them or tell them to avoid you.
Person 1: "Let's play paddy cake!"
Person 2: "...fine."
*Playing paddy cake*
Person 2: *rears fist in a way that looks just like paddy cake*
Person 2: *launches fist forward*
Person 1: *flies backwards*

Plot twist: Person 2 was using a Paddy Cake Fake-Out
by ThatGuyAtParties November 16, 2019
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Paddy Cake Was used as Conor Mcgregors nickname by the bully that stuffed him in his locker during middle school. The nickname lives strong in Dublin till this day.
Paddy Cakes - a nickname for UFC Champion Conor Mcgregor in middle-school.
How Conor Mcgregors bully talked to the young ladd in middle school -" Hey Paddycakes get in the fooking locker for fooks sake you bloody cunt "
by UrbanWebsterDic March 17, 2017
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