Noticed it in this Grauniad article.
It means to fire/sack someone, if that’s not obvious.
Cambridge Dictionary and Urban Dictionary have entries. The latter from 2008, so it’s been around a while, but I’d never noticed it before.
A clever use of the proposed opposite of “recruit” but it’s not a good parallel. Prince Andrew was never “recruited”; he was born. He can’t be fired or sacked. But I’m not a royalist, so, I can’t say.
A choir director for a former church loved using “Choral Detroit” for a closing piece by the choir.