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| Subject | English | Russian |
| brit. | loon about | вести себя раскрепощенно (Loon about is British slang for to behave in an uninhibited, light−hearted manner.  lingomash.com suburbian) |
| brit. | loon about | веселиться (suburbian) |
| archit. | loon-bin | психбольница |
| vulg. | loon pipe | заднепроходнее отверстие |