"To burden or be burdened with trouble; worry. noun. A worry; a trouble: carks and cares. Origin of cark. Middle English carken from Norman French carquier to burden, load from Late Latin carricāre ; see cargo ."
Example: "Geez, I didn't get paid this week. What a cark/I'm carked."
Another loose version of 'cark' is to cark it, as in my radio carked it, died, expired, etc.