Force (one's) hand verb phrase
To make someone do something they do not want to do or take action sooner than they had intended
To be honest, I didn't really want to come here, but Peter came and forced my hand.
You don't have to force my hand. I know what I'm doing,
To compel someone to do something
1. Force someone to swallow something
2. Force or try to make someone accept, endure, or agree with something unpleasant
By physical strength or brute force
A demonstration of power or capability to warn or to intimidate an opponent by display of a great numbers of people and / or resources
1. To make someone do something using force or threats
2. To intentionally underperform to deceive and take advantage of someon
The verb "force" should be conjugated according to its tense.
This phrase most likely refers to the "hand" (the cards) held in a game like poker, in which a player is forced to play a card from his hand or show his hand.
To make love or have sex with someone
They just jumped each other’s bones after one date.