| blue mud | โคลนน้ำเงิน [ธรณีวิทยา๑๔ ม.ค. ๒๕๔๖] |
| blue murder | (n) an extravagantly loud outcry, Example: she screamed blue murder |
| 紫貽貝 | [むらさきいがい;ムラサキイガイ, murasakiigai ; murasakiigai] (n) (uk) blue mussel (Mytilus galloprovincialis); Mediterranean mussel [Add to Longdo] |