What is Chubby-chaser?
1.
See
"He's such a chubby-chaser...if anything, he has a worse crush on Steve Harwell than I do."
2.
A person who seeks out bigger, or chubby men. Usually a smaller twink but sometimes another chub.
Randy is always staring at Ron's big, chubby butt. I think he's a chubby-chaser.