Ex: I’ve been on your porch knock for like 20 minutes where the hell were you? We were upstairs fixing the air conditioner.
2. Being late on the account of having sex
3. Actually fixing problems with a air conditioning unit.
Origin: Derek and Becky were sexing it up when people showed up to their house. After a few minutes of knocking (on the door) they appeared, and Becky shouted “we were upstairs fixing the air conditioner”.