If you know you go

The best spots are that way because they are little-known gems.

The term is shorthand for “if you don’t know about insert amazing place to surf/skate/mountain bike/climb/board/fish then I am not going to be the one to tell you.”

dude 1: "... hey bro where'd you surf today?"
dude 2: "Old faithfuls. It was firing - sick barrels, hardly anyone out"
dude 1: "Oh noice. Where the heck is that place? Someone else was sayin' it was going off the other day"
dude 2: "If you know you go..."