You'll have to tighten up a bit pf. This guy is going to bleed your chips away if you don't. So the more times you tangle with him, the more chips he'll take from you with pure aggression. Go after the other guys when you're in lp and the big stack has already folded. When you do have a strong hand, rope a dope or drop the hammer on the big stack, depending on stack sizes and whether or not he's one of those "Calling Station Big Stack Bullies" - the ones that will never let you bluff them.