The Last Straw That Breaks the Camels Back

I think there was a last straw. Do you want to explain what a straw? Yes, that this is the key phrase really, to explain why boris resigned, or why he was pushed out. Er, why heis being pushed out, because he still isn't out yet. But the last straw. So it's a common expression, just means the one little thing, which, er is the accumulation of lots of other things, which ultimatelyer changes the situation. This is the last straw that breaks the camels backo you camel, you've got lots of stuff loaded on on the back of the camel. You think always the camel going to make it. Is its back