thinko
In real, traceable use. Part of the curated seed collection; community review is coming.
Meaning · English
A careless mistake made in thinking.
Register: slang
Where it’s used:
Used
American English
Examples
I must have done quite a thinko, but I don't remember leaving my keys in the refrigerator.
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 “thinko” mean?
A careless mistake made in thinking.
Is “thinko” formal or informal?
thinko is generally slang.