It depends of what leaves you're talking about.

If it's just the small leaves that fall of the buds in your bag, then yeah, that is definatly smokeable and will get you high.

If you mean the fan leaves f a cannabis plant, then no, I don't recommend smoking them as is, unless you like headaches. If it is the fan leaves, dry them out, crumble them up, and make a hash or a hash oil with them. Keep in mind you need quite a bit of fan leaves to get any sort of hash or hash oil.

Peace.