あっそ LinksSentence search for あっそEdit in JMdict 1. oh, OK; oh, I see; oh, yeah?; hmmSee also ふん, usu. indicates a lack of interest「あっそ」となが流すのもよし、ほんき本気にするのもよし。You can let it slide with a "oh?" or you can take it seriously. Discussions Log in to talk about this word.