A language or behaviour that is particular to an individual or group.
A peculiar individual reaction to a generally innocuous substance or factor.
A peculiarity that serves to distinguish or identify.
A behavior or way of thinking that is characteristic of a person.
An object or event that is not regular or ordinary.
A violation of rules.
An instance of being irregular.
Irregular bowel movement (e.g. diarrhea or constipation).
The state or condition of being irregular, or the extent to which something is irregular.