A fork of Rural Dictionary
Not a cat.
Gotta love Blackadder.
"Definition of a dog: Not a cat" = Baldrick, Blackadder III (British comedy)
verb: to follow closely behind, or to check (someone) frequently, implies that the action causes some annoyance or interference (from the fact that a pet dog will often follow closely at its master's heels).
Similar in some senses to 'hound' as a verb.
The boss dogged me all morning until I got that report finished.