1-A large tank used within waste disposal and sewerage cleansing.
2-In cockney rhyming slang, a yank.
Those stupid septic tanks have just re-elected George Dubya Bush! Bang goes peace! More terrorism activities will happen now, this enacted by the yanks on Iran or Syria!
Interchangeable with Yank or Yankee, a euphemistic stereotype for Americans who spill forth verbal filth like a sewage plant.
Mate, I took that septic tank from the other day out for a surf. I was hoping the sharks would rip him to pieces but it looked as though they swam away in terror. It seems not even a Great White Pointer can swallow his bullshit.
Something that looks like shit (figuratively or literally), but is actually good. Named for the Hawthorn Hawks (AFL team) whose yellow and brown uniform makes them look like a septic tank of shit and piss, yet they are awesome despite the colour of their uniform.
Dane reckons the septic tank of awesomeness are gonna kick Geelong's arse tonight.