お株を奪う (おかぶをうばう) Japanese meaning | KotomoraMeanings
1
expression, godan verb (-u)
beat someone at their own game; outdo someone in their specialty
idiomatic expression
Idiomatic expression used when someone surpasses another person in the very area that person is known for or prides themselves on.
The newcomer gave a presentation that outdid the veteran employee in his own specialty.