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2.
Used to get someones attention
"Oi my side!"
"Oi girl im talking to you!"
by A lollerskater December 21, 2006
 
1.
An exclamation of the pain one's sides are experiencing as a result of laughing so hard.
"Justin Bieber is the best singer ever"
"HAHAHAHA MY SIDES"
by Swag McSwaggerson October 23, 2012