At your service.
A Jelly Baby
(Candy in the form of a baby made from what you colonial types refer to as jello) walks into a bar and starts talking to a Smartie
(more candy rather like an M&M). After a few beers the Smartie says, "Ere, a bunch of us are heading to that new club, fancy tagging along?"
("Hello old chap, some chums and I are off to sample that new entertainment establishment, would you care to accompany us?")
The Jelly Baby says, "No mate, I'm a soft centre, I always end up getting my head kicked in."
("No thanks - I'm a bit of a softy, there's a very good chance that I may be picked upon by ruffians")
So Smartie says, "Don't worry about it, I'm a bit of a hard case
("I'm rather tough"), I'll look after you."
Jelly Baby thinks about it for a minute and says, "Fair enough, as long as you'll look after me", and off they go.
After a few more beers in the club, three Lockets
(Hard, boiled throat sweets containing honey and menthol) walk in. As soon as he sees them, Smartie hides under the table.
The Lockets take one look at Jelly Baby and start kicking him, breaking cola
(Undrinkable American beverage) bottles over his little jelly head,
(could be difficult, I grant you - you'd think they would bounce) lamping
(striking) him with little sugary chairs
(more candy), and generally having a laugh.
(Enjoying themselves in an aggressive manner)
After a while they get bored and walk out. Jelly Baby pulls his battered Jelly Baby body over to the table and wipes up his Jelly Baby blood and turns to Smartie and says, "I thought you were going to look after me."
I was!" says Smartie, "But those Lockets are f***ing
(very) menthol
(mental)".
Oh dear I fear the joke wasn't strong enough to start with.