Gary the monkey

Coupon Slut - A person who holds up the line at the grocery store
with thousands of coupons they cut from newspapers they
stole of off their neighbors side walks. They manage to buy a whole
shopping cart worth of food and products for under $10 and you wonder
what advanced budgeting class they took to learn all their skills. Secretly
you are jealous of their money saving techniques but prefer to mock them
by referring to them as coupon sluts.