When a man and wife perform a sixty-nine on top of a gangster apartment complex in the ghetto, accidentally concieving a child which would be known as a hubba.
The lowest form of life ever to swim up from the depths of a cesspool, covered in decades of accumulated turds and piss, only to get banned from every roleplaying server he even considers logging into.
Hubba Bubba is a bubblegum that was used in the 1980's as a trading currency for sexual favours. Typically it would be traded for a love-bite and fingering behind the local Chinese takeaway.