Can we use this type of formation.
Stop bluffing. There's no need to hide it. Tell me already
Can already be used in this way.
That use of already is not only grammatical, but idiomatic—at least in US English.
From Merriam-Webster's definition of already:
2 —used as an intensive
// All right already.
// Enough already!
From Lexico (Oxford):
2 North American informal
Used after a word or phrase to express impatience.‘just stop already, no one feels sorry for you’
‘We'll start with a plea for this year to just finish already.’
‘Nobody wanted to tell him to just go home already.’
‘If you have a point in saying this, just tell me already.’
‘He needs to just retire already.’
‘I thought this was fine; let's just hurry up already.’
Tell me already!
In formal English, already means "before now", so it would be unnatural to use it at the end of a request for information... the speaker has not already told you.
In German, schon means already, but if used at the end of a request or command it also means come on! This found its way into Yiddish, as שוין (shoyn). When American Yiddish speakers switch to English, they sometimes finish a request with already, when they really mean come on!. It's the sort of thing that the Marx brothers would say.
From here, it found its way into humorous, informal American English as an expression of impatience. According to the Cambridge Dictionary, it is:
used to show that you are losing patience and want someone to stop doing something or to do something more quickly
Just some samples from literature:
I think this word can be used this way.
Context of first sentence:
“Kel?”
"Colder.” I wasn’t trying to be annoying; I just didn’t know if I was ready to share such fresh, earthshaking news.
“Just tell me already. What?”
I pressed both hands to my abdomen. “Baby.”
This sentence from the book Agave Kiss
Context of second sentence:
“Wha?” One eye blinked open.
“I’ve got to move you.”
He closed his eye again. “Then move me already.”
“No, not like that. Like off the bed.”
This sentence from the book Nightshifted.