Used as an oath or exclamation expressing asseveration, surprise, etc.
Origin
Early 17th century; earliest use found in Anthony Munday (d. 1633), playwright and translator. Apparently short for Gadzooks (although this is apparently first attested later).
Definition of Zooks in US English:
Zooks
exclamation
humorous, archaic
Used as an oath or exclamation expressing asseveration, surprise, etc.
Origin
Early 17th century; earliest use found in Anthony Munday (d. 1633), playwright and translator. Apparently short for Gadzooks (although this is apparently first attested later).