rimjob etiquette 

1. The unwritten, and largely unknown, rules surrounding what to do immediately after giving someone a rimjob (e.g., is it rude to kiss the person, or rude not to?, is it rude to use mouthwash, or rude not to?).
2. Any set of rules so informal (and not talked about or agreed upon) that no one is ever sure how to act.

1. I gave your mom a rimjob last night, but I wasn't sure what the proper rimjob etiquette was. She tasted fine, but I thought maybe I should use mouthwash anyway before kissing her. I didn't know what to do, so I left.
2. These days, I never know whether I'm supposed to pay when going on a date. It's like trying to figure out rimjob etiquette.

rimjob etiquette by The Fourth Man in the Tub June 7, 2011