To be careful and alert to the possibility of danger.

(UK, colloquial) do one's part

(idiomatic) Do not criticise matters outside your field of expertise; mind your own business.

present participle of keep a dog and bark oneself

Third-person singular simple present indicative form of keep a dog and bark oneself

Alternative form of buy a dog and bark oneself

(figuratively, idiomatic) to listen for important information.

To fulfill a commitment as part of keeping to an agreement.

To remain vigilant and ready for action.

present participle of keep the home fires burning