|1.||just so you know|
just want to let you know
just so you know, you are actually ugly like hell
|2.||just so you know|
A phrase tacked on to the end of a statement to imply that the information being given is simply a courtesy, when in reality there are specific expectations of you now that you have this information
What Danielle says to guy she's been seeing: Oh, hey I decativated my profile on the dating website, just so you know.
What Danielle REALLY means: You better take your dang profile off the dating website too....NOW!!!!