A word used in southern california mid 60's early 70's a word/expression meaning of: In full and total agreement of:,to go along with,To:Agree,Concur.
dude#1:Oh man! that car looks like a piece of S#!T! dude#2:I'm hep!(2) dude#1:hey man,I'm thinking about going down to mickey dee's for a quarter pounder you hep?dude#2:I'm hep to it(3)dude#1:Wow!that looks so cool the way everything is arranged dude#2:I'm hep to that!.