# throw in at the deep end

idiom

Source: https://englishreference.com/idiom/throw-in-at-the-deep-end
Updated: 2026-08-10

## Meaning

To introduce (someone) to a new situation without adequate preparation.

## Examples

- My boss threw me in at the deep end on my first day.
- You throw your children in at the deep end when they travel alone.
- The manager threw the new intern in at the deep end by asking her to lead the meeting alone.
- The teacher threw me in at the deep end by asking me to translate for the visitors when the official guide failed to show up.
- Without any prior training, the company threw the new recruit in at the deep end, forcing him to manage the entire project while the team was away.

## Origin

From an allusion to the architecture of the swimming pool, divided between a shallow end and a deep end. In the former, a person may stand on the bottom with their head safely above the surface; in the latter, the depth exceeds the height of the individual. The idiom describes the transition from safety to the necessity of immediate action. One must be able to swim, or at least tread water, to avoid drowning. It is a matter of basic buoyancy.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.