Here are some possible interpretations:
* "Decolet" could be a misspelling of "decollete," which is an English word meaning "having a low neckline, exposing the chest."
* "Decolle" might be a French word, potentially a misspelling of "décolleté."
To help you understand the intended meaning, please provide:
* The full context where you encountered the word.
* Any other details that might give clues about the intended word.
I'll be happy to help further with more information!