big mouth
US /ˈbɪɡ ˌmaʊθ/
UK /ˈbɪɡ ˌmaʊθ/

1.
geveze, dedikoducu
a person who talks too much, especially about things that should be kept secret
:
•
Don't tell him your secret; he's a real big mouth.
Ona sırrını söyleme; o tam bir geveze.
•
Her brother is such a big mouth, he always spills the beans.
Kardeşi tam bir geveze, her zaman sırları ortaya döker.