This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. Youth (young person, young people or the state of being young).

n. Of or relating to youth or youths.

n. Intended for youths.

"In a luridly-designed website, mimicking the style of "yoof" cartoons, it offers a bundle of downloads, including a pack of "climate crime cards", urging its recruits to spy on families, friends and relatives, inviting each of them to build up a "climate crime case file" in order to help them ensure their putative criminals do not "commit those crimes again (or else)!""