like instead of saying something like just saying you could be like just so you know ... like I'm going to cook dinner just so you know ... just saying sounds Rude "JSYK"
JSYK stands for Just So You Know.
My friend says it all the time because she thinks she's chill when she says it because noone else knows what it stands for. Then we have to just say it all out. It's more fun to just leave the person hanging by not telling them what it means.
Guy: Woo, Look at that girl in those shorts! Mmm.
Girl: JSYK, She's a huge slut. She's got babies daddies all around here right now.
Just So You Know. A newer term then the old and overused FYI. JSYK is a good alternative to BTW, as when you use BTW in a sentence, people might take more offense. Usually placed at the beginning of a sentence and commonly used in texting.