flub 
/ˈflʌb/ verb
flubs; flubbed; flub·bing /ˈflʌb/ verb [+ obj] US, informal : to fail to do (something) correctly : botch
▪ The ball went right to him but he flubbed the catch. ▪ The actress flubbed several lines.
▪ The ball went right to him but he flubbed the catch. ▪ The actress flubbed several lines.
— flub noun, plural flubs [count]
▪ a politician known for his verbal flubs [=mistakes, blunders]
▪ a politician known for his verbal flubs [=mistakes, blunders]
