Tit for tat. Quid pro quo. The core drive of western society. That which drives us to do better (or worse). Recompense for a job well (or poorly) done.
comment-say-shun, Noun, To have a conversation via Facebook, Myspace, Twitter, etc in the comment area. Usually results in useless notifications to people not taking part in the commentsation.
Due to heavy partying and shear laziness, Joe had to mix in a serious compensation brush to pass off some half-decent dental hygiene before his 12 o'clock appointment.