From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
flub sth. /flˈʌb ˌɛstˌiːˈeɪtʃ/
etw. vermasseln, verpatzen, vermurksen, vergeigen, verbocken, versemmeln, verpfuschen <v, trans>
Synonyms: botch, bodge, bobble, bungle, foozle
see: bobbling, bungling, foozling, flubbing, bobbled, bungled, foozled, flubbed, bobbles, bungles, foozles, bobbled, bungled, foozled