Green’s Dictionary of Slang

yoof adj.

[deliberate mispron. of SE youth + mimicry of the ‘street-cred’ London accents of presenters of such programmes and of their doyenne, the then TV executive Janet Street-Porter (b.1946)]

used of anything – esp. TV programmes – high on pop gossip and fashion, low (in critical eyes) on intelligence, that is aimed at the young; also as a n.

[UK]J. Osborne Déjàvu Act I: A palpable hit. On the behalf of yoof.
[UK]Indep. 26 June 10: Now aged 39, he says he is ‘completely out of touch with yoof culture.’.
[UK]Indep. 12 Nov. 5: Elderly beat yoof in the great national spelling competition.
[UK]Guardian G2 9 Feb. 3: Bacon is now launching his own yoof-TV show.
[SA]Mail & Guardian (Johannesburg) 19 Aug. 🌐 A bliksem a day keeps the yoof away.