madder do ee, madder do ee fuk
A Cornish way to say who cares, it's not worth the hassle and you're too tired to even think about it
'Madder do ee, madder do ee fuk' after his dog ate his homework again
'Madder do ee, madder do ee fuk' when his mom yelled at him for being late
'Madder do ee, madder do ee fuk' after getting dumped on a Tuesday