Jiggered

Heard widely across Northern England, used to describe being worn out or, shouted as an exclamation, genuine surprise. It works as a euphemism, standing in for a much blunter word, in the same family as saying "I'll be blowed!" instead of something ruder. The word "jigger" itself is recorded from the 1820s in a completely unrelated sense, referring to an illicit distillery, and nobody has convincingly connected that meaning to the exhausted or astonished sense of "jiggered," which is recorded separately from the 1830s. Its real origin remains unclear.