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Any sexual act performed outside of one's own main relationship. Also called cheating, but with less negative implications...
Phil: Damn, I am going to hook up with that biznatch for some side action...

by Trey Bone June 30, 2006
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2
1. Side Hoe.
2. The act of putting a specific activity or event before your significant other, making that person the side action.
3. Hobbies.
1. Never would I want to be yours, or anybody's side action.
2. You could be my side action, after I fulfill my obligations when in comes to responsibilities.
3. Gardening is a side action I would like to take up.
by PineappleJuice March 12, 2015
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