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A phrase used to describe a woman you are having sexual relations with outside of another relationship.
My main girl found out about my side taco and now I'm sleeping in my car.
by NoOnesSideTaco August 23, 2019
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Word used as a separate thought from the main story, only to go back to the story later. Much like eating the main entre of a dish but suddenly your waiter brings a taco on a separate plate. You stop to eat the taco and later continue to finish the entre.
Dude, I sent my mom a potato in the mail with Happy Mothers Day on it and...oh side taco, I once tried to give a hobo money only to find out it was a trashcan. So yeah! She was excited about the potato. Ha!
via giphy
by LyndseyLynz May 16, 2016
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