They fumbled a good opportunity to take control of the market.

What's the meaning of "fumble" here?

Question

They fumbled a good opportunity to take control of the market.

What's the meaning of "fumble" here?

Answer

Fumbled in the context means they messed up or ruined an opportunity.

Answer

Mishandled, missed, didn’t take advantage  of

Answer

Hi Dinghui, 
“Fumble” means handle badly. It’s usually used literally, e.g. if you try to catch a ball but drop it. Here, it means that they did not make good use of the opportunity. 
Hope that helps :-)