blabbermouth

Hi to everyone!
I know blabbermouth is a person who talks too much or indiscreetly.
Is there any synonym to describe a blabbermouth guy?
American english.

There are some blabbermouth guys at school.

Is the example ok?

Blabbermouth is a noun. I would be more likely to say:

Some guys at school are blabbermouths.

Or did you want an adjective that you could use?

Hello, Manan. Here's a link to the WR dictionary's definition for "blabbermouth". You'll see that it is defined as a noun in the definition. I've also heard it used as an adjective, which is a fairly common thing to do in English. Native speakers often use one noun to modify another.

Not long ago, I heard a mother turn to her children and say: No more poo-poo jokes! "Poo-poo" is a childish term for feces. It's ordinarily used as a noun, but the mother used it as an adjective to modify "jokes".

You have used "blabbermouth" to modify "guys" in your example. This sounds perfectly normal to me. You could also just use "blabbermouths" instead of "blabbermouth guys". That would also sound normal.

Your example looks fine to me. 👁 Smile :)


[edit] I see that Cagey prefers to use "blabbermouth" as a noun. It's far more common to use it that way.

You probably don't want to say that there are some "loquacious guys at school,"👁 Smile :)
but you could say that there are some "talkative guys at school." But "blabbermouth," besides meaning someone who simply talks a lot, can also means some who reveals secrets or confidences. There are some more direct slang/colloquial terms for them, such as "rat" (which also has other meanings) and "snitch," if that's the meaning you have in mind.

Gossipy is another possibility if you mean someone who doesn't just talk a lot but also spreads rumors and doesn't keep secrets:

Be careful what you say. There are some gossipy guys at school.