bird-dog

(verb) To engage in the relentless pursuit of an objective or goal, often involving the accomplishment of tasks through other, less expedient people. This includes obsessive follow-up, nagging, and harrassment of individuals holding up the accomplishment of the goal. Comes from a reference to pointer dog breeds that serve as loyal hunting dogs, leading the way to the fallen fowl.

In football, the expression used to describe when a quarterback stares down receivers before throwing to them. The term is used because a hunting dog will become fixated on the target bird and never take his eyes off of him. This is extremely frowned upon since it tips off the defenders and could result in horrible hits on your receivers.

To bird-dog something is to complete a task using a slightly dodgy or unorthodox method.

Performing the task this way should save time, effort or money.

It can involve a dangerous act in order to get the job done.

To hound or pursue something or someone with a usually malicious intent.

Derived from the use of a bird dog to hunt game.

Apparently mistaken by millennials as a slang hybrid of 'bird' being female, and 'dogging' being the act of cuckolding or sharing of one's wife willingly or unwillingly, whilst obviously overlooking the actual normal every day meaning of the term to the point it irritated me to make a bloody account on here to set things straight. So upvote this definition so these low life tweens can at least use the term correctly.

(noun) a guy who is primarily interested in romancing other people's girl friends. Immortalized in the 1950s by the Everley Brothers in a song of the same name.

To watch someone closely while making no attempt to hide that you are doing so.

used in the trucking industry - especially on the CB radio as truckers talk to each other.
A bird dog can be noun which means a radar detecter.
Or can be a verb which means a law enforcement officer is paying particular attention to a trucker