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1. An organic chemical compound with the formula CH3CHO or MeCHO. It is one of the most important aldehydes, occurring widely in nature and being produced on a large scale industrially.

2. Accidental anal sex caused by overconsumption of ethanol.
1. Don't drink ethanal, it'll fuck you up.

2. This fucker gave me ethanal last night, it fucking HURT!
by drunk_ November 09, 2010
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