YabbaHubba (pronounced yabba hooba) is an adjective which shares the same meaning as "good", "ok", or even "fun".
(Aiden spills milk from the fizzy drink section)
Chris: That wasn't very Yabba Hubba
or
(Aiden & Chris absolutely demolish a group of vandal youths inside a museum)
Chris: Mate that was a Yabba Hubba moment.
Aiden: Aye mate aye mate aye mate it was a Yabba Hubba moment.
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
Precedes or follows either a gratuitously disrespectful or honest remark, originated in New York City. Used in similar fashion to "no offense" or "to be honest," interchangeably.
Ya mans is wild buns, respectfully. Respectfully he's washed.
After school, The Modells on Jamaica Ave was active. Respectfully.