madder do ee, madder do ee fuk
A Cornish way to say why would you even try, it's not worth it and you're too fed up to do anything
'Madder do ee, madder do ee fuk' after his phone died during a test
'Madder do ee, madder do ee fuk' when his dad forgot his own name
'Madder do ee, madder do ee fuk' after getting stuck in traffic for an hour