# crack a fat

idiom

Source: https://englishreference.com/idiom/crack-a-fat
Updated: 2026-08-10

## Meaning

To get an erection of the penis.

## Examples

- He felt embarrassed when he cracked a fat in class.
- The teenager tried to hide behind his bag because he had accidentally cracked a fat during the presentation.
- The sudden physical reaction caused him significant distress, as he found himself cracking a fat at the most inappropriate moment during the formal ceremony.

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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.