Definitions by MFN

they're gonna know 

1. Something you say when you're high and other people that shouldn't know are going to know.

2. You're going to smoke weed

1. "Dude, I'm so high right now...my parents....they're gonna knowwwww!"

2. Martin: "Whatcha doin tonight?" Sam: "They're gonna know ;)"

they're gonna know by MFN September 22, 2010