zipper

mastery
UK /ˈzɪpə(ɹ)/ US /ˈzɪpɚ/nounverb

card 1 of 10 · context meaning

What does 'zipper' mean in this sentence?

They would handle all the night combat air patrols, the night hecklers who would go over the enemy airfields, and we formed a new little gimmick called 'zippers' to help close that gap between the time the daylight strikes left the target and darkness.