An expression similar to “On God,” but instead of being on God, it’s on bug. (Can be abbreviated to ‘Onb’ and is often accompanied by the green bug emoji: ‘🐛🐛🐛.’
The predicate that compares one thing that is greatly attracted to another. A similar expression to "like white on rice", or "all over him like a cheap suit".
Ex. 1 - "You'd better not insult my girl, Bessy-Sue, no mo 'bout wearin that mumu or I'll be on you like ducks on a June bug". (Implies aggression)
Ex. 2 - "Yes Ma, I'll be on top of my homework like ducks on a June bug". (Implies diligence)