Used as a codeword for biftas or fatties that can be used in the presence of parents or police officers without arising suspicionof what you really talking about. Could be used to make you mum think your eating heathily.
At a family dinner.
Brother- hey sis, had sum bananas last nite, fuckin brilliant.
Sister - cool, got sum left?
nasty hair gel, smells like festering bananas, used to describe the smell in a room full of african women with "artistic" hair
When walking in to a grocery store you see several african women congregating in the aisle you intend to peruse and you can't get through, and they seem to be ignoring any attempts to pass.
"I smell bananas!"