Watch (someone's) back American British verb phrase
Protect one from harm caused by unforeseen events
Don't keep much money on your backpack and watch your back on the bus.
Jenny has faced sexual harassment, so I will call the police officer to watch her back and cease those bad things from re-occurring.
If any gangster bothers you in this area, I will watch your back.
To be trustworthy, secure or firm.
1. Used to indicate an extra seat or portion of the main seat of a motorcycle meant for a passenger (traditionally occupied by a woman).
2. Used to say that a protective pad is worn on the groin area to protect it during sporting events and is usually worn by women.
3. Used to indicate that a pad is used with a barbell during squats to give cushioning and support to one's neck, so-called because it is looked down on by some as being unmanly to use.
Used to say that someone becomes less guarded or vigilant or ceases being wary of potential problems or danger.
To protect or express one's support for someone or something.
The verb "watch" should be conjugated according to its tense.