HANG BY A THREAD' Hang By A Thread is an idiom that is used to describe a situation that is very precarious and uncertain. It implies that the situation is so fragile that it could be destroyed at any moment. The term is often used to describe a relationship, job, or other situation that is in danger of ending. The crossword solution for this term is 'DANGLE, ' which is an appropriate word to describe the precariousness of the situation.