...... is he acknowledging he doesn't have anything up top?

I reckon you've nailed it.

I guess so

Nah - means he's lost his job - so he's Roofless!

It's as annoying as boom.

It means he's had it away with all the lead.

London speech impediment

It's coz he's a LAHHHHNDAAAN GEEEEZER innit blud

*vom*

The only thing more annoying that someone with a catchphrase is someone trying to establish their catchphrase.