To act like a right Hobnob in the tea, is to have a tantrum and deliberately sabotage something nice, either for yourself or someone else. Taken from the selfish nature of the hobnob biscuit, which presents itself as a tough 'come dunk me bro' biscuit, only to crumble when submerged. Similar to 'pissed on your chips'.
Stop it! You're ruining it for us! You're acting like a right hobnob in the tea!
A silly phrase shouted by a Titanic lookout when an iceberg was spotted
Lookout: Iceberg Right Ahead!
First Officer: Hard a starboard!
2 and a half hours later
Oh fuck everyone drowned or got hypothermia
When your spotting your mate at the gym, and he's just banged out 3 sets of 12. It is now well within your right to bang out 3 of your own
Guy 1: So I was spotting Tim at the gym the other day and he finished his sets and went off to train shoulders elsewhere
Guy 2: Mate you should have brought up Spotter's Rights...
Guy 1: Ah shit yeah, I forgot about that, Ill get him next time.
When someone wants to make a dirty joke but doesn't say it and leaves it to the listeners imagination.
Arisa: *Eats a hotdog*
Reg: "I could make a joke right now."
Australian for "I don't care about your opinion"
Old mate: "Steve; your wife jut took the kids, your house is a shit hole, you haven't had a job in 20 years and you're just sitting on the couch drinking beer!"
Steve: "She'll be right mate"