¡Que oso! 

¡Que oso! Is a slang used in Mexico, usually by young people, and you can hear it typically from fresas or people who are wealthy, snob, raised in the luxurious, well cared real estates or rich neighborhoods unlike living in the barrio (hood). Its meaning is to be ashamed of something that was done from oneself or others, like making a fool. Its literal meaning is: What bear!

Girl 1: Wey, ¡Que oso! ¡Yo coqueteandole y salió que ya estaba en una relación!

Girl 2: ¡Te dije que tenia novia, pero me mandaste a la fregada!
Girl 1: ¡Pues no creí que andarán de verdad!
Girl 2: ¡Orale pues, ve a hacer el oso tu sólita a la siguiente!

Translation:
Girl 1: Wey ¡Que Oso! I was flirting with him and turns out he is in a relationship!

Girl 2: I told you he had a girlfriend, but you ignored me!

Girl 1: Well, I didn't think they were dating for real!
Girl 2: Orale, next time make a fool of yourself without me!

¡Que oso! by Becalicious July 31, 2020

Qué oso 

Spanish expression to mean that a situation was embarrassing. A person can use this expression to express his/her shame. A good translation is "What a shame!"

1. De repente quedó empeloto en medio de la reunión, qué oso! - Suddenly he lost all his clothes in the middle of the meeting... qué oso!.

2. Estaba borracho y mi jefe me cogió vomitando sobre una alfombra costosa en su casa... qué oso!. I was drunk and I was caught by my boss puking on an expensive carpet in his house in one of company's parties... qué oso!.

Qué oso by Pedro Piqueras August 22, 2006