Can you please translate this sentence for me. I would be grateful if you could explain in which situation it is generally used.

"Dilinin altında bir bakla var"

Thank you in Advance!

 Its Turkish idiom. The meaning is " You are trying to say something"

Thank you Harp00n! You´re great!!

 You are welcome

                                  "Dilinin altında bir bakla var"

  its literal translation is   " You have horsebean [broad bean] under your tounge " which means " You are hiding something from me"

You are hiding something from me , you know something but you dont tell .

You mean something but you dont tell.

The meaning is very clear now. Thank you Tunci... very helpful as always!!