1
general::
Phrase(s): jerk something up
1. to pull something up quickly. • He jerked his belt up tight. • He jerked up the zipper to his jacket. 2. to lift up something, such as ears, quickly. • The dog jerked its ears up. • The dog jerked up its ears when it heard the floor creak. • The soldier jerked his binoculars up to try to see the sniper.
McGrawhill's American Idioms And Phrasal Verbs