虻蜂取らず - Kiokun Dictionary

Japanese

虻蜂取らず、あぶはち取らず、アブハチ取らず、虻蜂とらずあぶはちとらず、アブハチとらず同音

exp. idiomatic attempting two tasks at the same time, accomplishing neither; falling between two stools; (literal) catching neither the horsefly nor the bee