rocks in one's head
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
An inability to think clearly and rationally.
Register: slang
Where it’s used:
Used
American English
Examples
Fancy bringing all the chaplains together at six o'clock on a Friday night in the heart of Sydney. They've got rocks in their head.
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).
Common questions
What does “rocks in one's head” mean?
An inability to think clearly and rationally.
Is “rocks in one's head” formal or informal?
rocks in one's head is generally slang.