Hungry Garbage

1) A lower-class individual who, through pure determination, rises from their unfortunate circumstances to better themselves and create something amazing, be it physical or abstract.

2) A poor uneducated individual who seeks to end their ignorance through acquisition of knowledge.

"You see that guy selling oranges by the freeway? He smells like shit and he's dirty as fuck, I would never buy oranges off him"
"C'mon man you gotta give it to him, he may be garbage, but he's Hungry garbage, hungry for that cash."

OR

"He may be homeless and hungry literally, but he's starving metaphorically, starving for that knowledge, like some kind of Hungry Garbage"