What’s the semantic content of the word “yo” in the speech of Jesse …

Yo (interjection) : A greeting or said to get someone’s attention; hey: Yo, dudes and babes! – [1859+; even though yo and yoho are very old utterances, found by 1420, the recent revival of yo as a primarily black interjection has spawned comment; Ernest Paolino of Philadelphia, indignant because a New York writer had claimed the syllable for …

https://english.stackexchange.com/questions/386327/whats-the-semantic-content-of-the-word-yo-in-the-speech-of-jesse-from-breakin