be like jelly
be like jelly
To be or feel very unstable or weak. This phrase is often used to describe the knees or legs. My legs were like jelly when I got off that roller coaster—I had to sit down right away.
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.
be/feel like ˈjelly
(also turn to ˈjelly) (of legs or knees) feel weak because you are nervous or frightened.: She couldn’t move — her head was swimming, her mouth was dry and her legs felt like jelly.Farlex Partner Idioms Dictionary © Farlex 2017