From the Shirtpunch.com's interview with the artist:
"Question: What inspired this design?
Answer: I am an old animator from the North of England, not as old as myself in 10 years, but older than I was last week ... I like sponge and although often go by the name of 'oi' my name is Billy Allison - known on several websites etc as Bleee."
About Shirtpunch.com: It's simple; ShirtPunch is your home for limited edition, pop culture tees... but there's a twist! We only offer one shirt every 24-hours, and they're always only $10.
