Created By: Arilou on March 11, 2009
Searched for it, but only found it inside articles, none of which seems to fit. Stock phrase. If two characters (usually with lots of UST) are either arguing with each other or just getting along well, someone is apt to comment that they behave just like a married couple (usually to indicate that they seem to be familiar and comfortable with one another, either just straight up or that they are so comfortable with each other that they can argue openly) Seen It a Million Times.
Hello, Unknown Troper. You'll need to get known to lend a hand here.