give somebody a leg-up

Từ điển Oxford Advanced Learner 8th

give sb a ˈleg-up idiom
(BrE, informal)
1. to help sb to get on a horse, over a wall, etc. by allowing them to put their foot in your hands and lifting them up
2. to help sb to improve their situation
•The loan from his father gave him a leg-up when he needed it.
Main entry: ↑leg-up_idiom