donner un coup de pouce
“Donner un coup de pouce” is a French saying that literally means “to give a push of the thumb.” It really means a rapid and audacious attack, a smart way to proceed, some momentary help, or just help in general.
The origin of this idiom is unknown. Its first date of use is also unknown.
Similar English expressions include “nudge,” “to lend a hand,” and “to give a boost.”