Expression used to dismiss or negate something's importance or significance; 'it's nothing at all', 'it does not matter'.
Verb-dictionary form + もなんでもない, い-Adjective + もなんでもない,な-Adjective + なもなんでもない, Noun + もなんでもない
Long explanation:
The ~もなんでもない grammar point is used to dismiss or negate the importance or significance of something. It can be translated as 'it's nothing at all', 'it does not matter' or 'it's no big deal'. The phrase is most commonly used with Verbs in their dictionary form, い-Adjectives, な-Adjectives, and nouns.