overplay your hand

US /ˌoʊvərˈpleɪ jʊər hænd/
UK /ˌoʊvərˈpleɪ jʊər hænd/
"overplay your hand" picture
1.

exagerar, ir longe demais

to spoil a strong position by overdoing something or being too confident

:
He tried to demand too much and ended up overplaying his hand.
Ele tentou exigir demais e acabou exagerando.
The politician might overplay his hand by making such extreme promises.
O político pode exagerar ao fazer promessas tão extremas.