A person who is addicted to taking 'Bubbles' in the most inappropriate places such as school, rugby pitches, toilets and in the bath... etc.
These people mainly do it for the Social aspect or to 'look hard' rather than because they actually enjoy the effects of the drug. These are sad, sad people...
Mate 1: Here Mate, I've got some Bubbles, lets snort some on the school bus!
Mate 2: Okay man, sound. We'll look well hard!
Mate 3: ... You guys are such a pair of Bubble Munchers!