We found one dictionary that defines the word jump off the deep end:

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1. jump off the deep end: Idioms

▸ Words similar to jump off the deep end ▸ Usage examples for jump off the deep end ▸ Idioms related to jump off the deep end ▸ Wikipedia articles (New!) ▸ Words that often appear near jump off the deep end ▸ Rhymes of jump off the deep end ▸ Invented words related to jump off the deep end