Once an employee tendered a leave application to his office manager, reading:
Due to expected circumstances tomorrow, I am having an unbearable headache today. Kindly grant me two days leave, for today and tomorrow.
What were those expected circumstances? His degree results would be declared tomorrow; he was certain about his failure- no doubts about it! So, the poor guy was having headache in advance!
The big dictionary gives a brief meaning to the word headache: …