overplay your hand
US /ˌoʊvərˈpleɪ jʊər hænd/
UK /ˌoʊvərˈpleɪ jʊər hænd/

1.
terlalu yakin, berlebihan
to spoil a strong position by overdoing something or being too confident
:
•
He tried to demand too much and ended up overplaying his hand.
Dia cuba menuntut terlalu banyak dan akhirnya terlalu yakin.
•
The politician might overplay his hand by making such extreme promises.
Ahli politik itu mungkin terlalu yakin dengan membuat janji-janji ekstrem seperti itu.