"Tengo un mal presentimiento" -> I have a bad feeling We use it to say that we feel that something bad is going to happen.

"Tengo un mal presentimiento" is an expression that we use a lot in spanish, it means "to have a nadie feeling" and you use it when your gut tells you something's going to go wrong. In spanish you can also say: -Tengo un mal presagio. -Algo huele mal. (used when something is weird or sketchy)