1. To maintain a relaxed, informal, or non-serious approach to a relationship, situation, or interaction
We're just keeping it casual right now, nothing serious.
Estamos apenas mantendo as coisas descontraídas agora, nada sério.
2. To avoid formality, pressure, or commitment in a dating relationship
He wants to keep it casual without any expectations.
Ele quer manter algo casual sem expectativas.
3. To dress or behave in a relaxed, unpretentious manner
Let's keep it casual for the party - jeans and a t-shirt are fine.
Vamos manter um visual casual para a festa - jeans e camiseta estão ótimos.