zack
/zak/
Proposed by a contributor, not yet supported by evidence.
Also seen as: zacks
Sense 1
Meaning · English
Sixpence.
Noun
Examples
"Strewth, Dad! It's not worth a zack!" said Barry.
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Sense 2
Meaning · English
A six-month or six-year prison sentence.
Noun
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Common questions
What does “zack” mean?
Sixpence.
Is “zack” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.