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."
Another name for a rectum that sees a lot of penetrative sex, with or without a condom. Typicallyreserved for gay males but could be used for females/trans/non-binary etc.