1. A brief exclamation used to denote the sudden realization of a missed observation or situation
2. A general exclamation of realization, bearing a negative connotation
3. A phrase of displeasure or distaste
1. a) Did you remember your smokes? b) Gner! Forgot 'em...
2. Gner! We have a test today don't we?
3. She blew me off. Gner.