Pouring old milk, juices, coffee on grass

Is it safe to pour old (expired) milk, juices, and coffee on grass?  I have a bunch sitting in my fridge and I don't want to pour it down the sink (leaves a nasty smell.)  So the alternative is to pour it on the lawn.  But since I'm renting, I don't want to piss my landlord off if it kills the grass.  Any ideas?