No, "for fucks' sake" is not grammatically correct in standard English.
Here's why:
"fucks' sake" implies a plural possessive:
- "Fucks" = plural of "fuck" (as in multiple "fucks")
- "Fucks’" = possessive of that plural (something belonging to multiple "fucks")
- So "for fucks' sake" would mean "for the sake of multiple fucks" — which is not the idiomatic expression in use and doesn’t make grammatical or idiomatic sense in context.
The correct form is "for fuck's sake":
-
This is a singular possessive: "for the sake of fuck".
-
It mirrors other standard expressions like:
- "for God's sake"
- "for heaven's sake"
- "for Pete's sake"
Summary:
Form | Grammatical? | Meaning |
---|---|---|
for fuck's sake | ![]() |
Standard idiom; expresses frustration |
for fucks' sake | ![]() |
Incorrect plural possessive |
for fucks sake | ![]() |
Missing apostrophe; not standard |