look out for number one

US /lʊk aʊt fɔr ˈnʌm.bər wʌn/
UK /lʊk aʊt fɔr ˈnʌm.bər wʌn/
"look out for number one" picture
1.

mirar por uno mismo, pensar solo en uno mismo

to always put your own needs and interests before those of other people

:
In this competitive industry, you really have to look out for number one.
En esta industria competitiva, realmente tienes que mirar por ti mismo.
She's always been someone who looks out for number one, even at the expense of others.
Siempre ha sido alguien que mira por sí mismo, incluso a expensas de los demás.