armed to the teeth
US /ɑrmd tu ðə tiθ/
UK /ɑrmd tu ðə tiθ/

1.
carrying many weapons
:
•
The soldiers were armed to the teeth, ready for battle.
•
The robbers were reportedly armed to the teeth when they broke into the bank.
2.
having a lot of something, especially information or resources
:
•
The legal team was armed to the teeth with evidence.
•
Before the negotiation, he made sure he was armed to the teeth with facts and figures.