a pure rigger
A person who would eat a rat if it was free, but would yell at you for stealing a single crumb from their plate.
My brother’s a pure rigger. He ate a sandwich for a month and still wouldn’t give me a bite.
That guy at the gym would rather starve than spend $1 on a protein bar.
My sister’s a pure rigger. She bought a $5 bag of chips and said it was ‘a steal’.