ETYMOLOGY
from gad (used to express strong feeling) + zooks (origin unknown)
EXAMPLE
“…Buz. Ile first take tother cup, and then out with’t altogether—And now it comes—If my Mistress do bring him home a bastard, she’s but even with him.
Nat. He has one I warrant. Has he cadzooks?…”
From: The English Moor or the Mock-Marriage,
in Five Nevv Playes, viz. The English Moor. The Love-sick Court. Covent Garden Eeeded. The New Academy. The Queen and Concubine,
By Richard Brome, 1659
Lexicophilia 