fall between two stools
Speech parts
1. fall between two stools - Verb
2. fall between two stools - Phrase
Meaning
(idiomatic, of tasks, issues, problems, items) To fit into neither of two categories and, hence, be neglected or fail.
(idiomatic) To attempt two roles and fail at both, when either could have been accomplished singly.
Source: en.wiktionary.orgSynonyms
Examples
Sometimes we feel we straddle two cultures; at other times, that we fall between two stools.