ammo up
Advanced (C1) informal
Get a lot of bullets (or facts and arguments) ready before a fight.
"The soldiers ammo'd up before the patrol into enemy territory."
Hear it in context
(LIVE) Toxic Commando Giveaway & Showcase on Legion 7a
Lenovo Legion · 54:23
Is there Maybe there's ammo up here.
A Screaming Eagle in Holland: How Don Burgett Saw Operation Market Garden | American Artifact 207
The History Underground · 112:21
were deployed in the back here passing ammo up to him.