stonkered
Concise Oxford English Dictionary © 2008 Oxford University Press:
stonkered/ˈstɒŋkəd/
▶adjective Austral./NZ informal utterly exhausted or defeated.
■ drunk.
– origin 1920s: from Scots and northern English stonk ‘game of marbles’, perh. of imitative origin.
'stonkered' also found in these Oxford entries:

