Green’s Dictionary of Slang

(UK juv.) the penis; thus a general insult.

1993		Pat Tierney Moon on my Back n.p.: One fellow might say to the other: ‘How’s your mott’s belly fixed for a lodger? and the other fellow might respond: ‘Your lozenger is not big enough to give a lodger to a flea!’ [BS].
2001		OnLine Dict. of Playground Sl. 🌐 lozenge n. 1) The male penis. 2. An excessively stupid or unpleasant person.