The name given in Costa Rica to a card game where the goal is to avoid being left with the single unpaired card at the end of the round. (Known in English as Old Maid and in other Spanish-speaking regions as la mona).
Let's sit on the floor and play a round of tonto to pass the time while it stops raining.
Used to describe someone who is not very sharp or who lacks common sense. It is the standard way to call someone dim-witted or foolish for making mistakes by not thinking things through.
What a tonto guy, he left the window open and the downpour flooded his whole room! (Mae is a common Costa Rican term for dude).
Used to describe someone who lacks sharpness, is naive, or isn't street-smart. It also refers to situations or ideas that are nonsensical or defy common sense.
That guy is really tonto, he totally fell for the story that they were going to double his salary in a week.
Used to describe someone who is dim-witted or has a hard time understanding simple situations. It also applies to comments or actions that lack any logic. (In Guatemala, it is often paired with 'vos', the local informal word for 'you').
Don't be tonto, man, pay attention to what the boss is saying if you don't want to get scolded!
Used to call someone a dummy or point out that they are being incredibly naive. It also describes actions or comments that are totally nonsensical or illogical.
Don't be such a tonto, how could you believe they are giving away a trip to Margarita on Instagram? (Margarita is a famous resort island in Venezuela).