# clog up

idiom

Source: https://englishreference.com/idiom/clog-up
Updated: 2026-08-10

## Meaning

To block something completely and physically.

## Examples

- Too much hair will clog up the drain.
- If you pour grease down the kitchen sink, you will clog up the pipes.
- The heavy autumn leaves began to clog up the storm drains, threatening to flood the street during the evening rainstorm.

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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.