be on the look-out for something—be watchful wishing to find or acquire smth.:
- Restaurant manager Jose Padilla is always on the look-out for something new for his customers.
look out for something—(also: watch out for something )
1. be on the alert for smth. harmful or dangerous:
- There were signs everywhere warning people to look out for falling rocks.
2. = be on the look-out for something:
- I’ve been looking out for a new job for six months.
3. take care of smth.; protect smth. from harm:
- When this young man is away from his home, I look out for his property.
See also: outlook for something / outlook on something.