flab·ber·gast 
/ˈflæbɚˌgæst, Brit ˈflæbəˌgɑ:st/ verb
flab·ber·gasts; flab·ber·gast·ed; flab·ber·gast·ing /ˈflæbɚˌgæst, Brit ˈflæbəˌgɑ:st/ verb [+ obj] : to shock or surprise (someone) very much
▪ It flabbergasts me to see how many people still support them. — often used as (be) flabbergasted ▪ We were flabbergasted by/at the news that he'd won the game.
▪ It flabbergasts me to see how many people still support them. — often used as (be) flabbergasted ▪ We were flabbergasted by/at the news that he'd won the game.
— flabbergasting adjective [more flabbergasting; most flabbergasting]
▪ flabbergasting news
▪ flabbergasting news
