inconsistency between words and actions; not practicing what one preaches
A formal yojijukugo describing a gap between what someone says and what they actually do. Often used in critical or reflective contexts.
The politician's inconsistency between words and actions was criticized.
I want to be careful not to have any gap between my words and actions.
言行一致 means consistency between words and actions, the opposite of 言行齟齬.
A yojijukugo composed of 言行 (words and actions) and 齟齬 (discrepancy, inconsistency). The exact historical origin is uncertain, but it follows a common four-character pattern for expressing abstract concepts.