uncle
The Spanish word 'tío' directly translates to 'uncle' in English. It's a common term used to refer to a parent's brother. Similar to English, 'tío' can also be used colloquially in some regions of the Spanish-speaking world to refer to a close male friend. This is often used informally and among peers.
That guy is very funny.
This phrase is a casual way to describe a male person as being humorous or entertaining, using 'tío' to refer to him in an informal context.
Yesterday I met an amazing guy.
In this instance, 'tío' is used to denote a man in a friendly manner, emphasizing the impression that he made during their encounter.
María's uncle invited us to dinner.
Here, 'tío' refers to an uncle in a familial context, highlighting the relationship between María and the man who extended the invitation.