Concentrate hard on this one. Especially the Americans out there:
Septic = Septic Tank = Yank.
Savlon = Antiseptic = Anti-yank
"All yanks are fat fucking works shy cunts"
"You can't say that, you're a fucking Savlon"
One who dislikes Americans. Related to Septic as in Septic Tank - Yank
I fucking hate yanks, antiseptic and proud.