1. fall between two stools - Verb
2. fall between two stools - Phrase
(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.orgSometimes we feel we straddle two cultures; at other times, that we fall between two stools. Salman Rushdie