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The Colombian Sewer - A sex move where a person sniffs cocaine ( a drug prominent in Columbia) off another persons ass crack after doing anal - there may be feaces over it and it may stink hence the name Sewer.
E.g "Hey Dave, how did you get on with that bird last night? "
"Bro she said do the Colombian Sewer, i did't want to but i was too drunk to care."

"Bro thats nasty."
by Bornator January 25, 2018
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