tough bikkies.

"Bikkie" is a New Zealand/Australian abbreviation of "biscuit," and the phrase roughly translates to "Tough luck. But life is hard - even eating biscuits can sometimes be hard - so you should probably just suck it up."

"Dr Toughlove, can I still get credit for the assignment that I've handed in two weeks late?"
"Nope, it's far too late. Tough bikkies."