Irregularity

He is the last man to commit an irregularity.

We will no longer turn a blind eye, but will publicly denounce every irregularity, no matter how small.

A new track-recording vehicle has been developed for British Railways as part of the modernisation programme. It can locate and record the smallest irregularities in the track, and will be an aid to railway engineers in making better use of manpower and materials for track maintenance.

an irregularity of surface

An investigation of the irregularities in the company's accounts uncovered a large-scale fraud.

Consuming copious amounts of vegetables, fruit, milk, and an abundance of water effectively treats irregularity. Establishing regular eating, bowel movement, and exercise habits are helpful too.