Noun: A massive erection achieved from the filthies whomp making bass sex to one's ears.
"Bro, have you heard the new Bassnectar set?"
"Ya, dawg. I might need to call a doctor because I've had a relentless dub chub for the past hour."
A double cheeseburger at McDonalds.
"Hey, can I get $50 worth of Dub Chubs?"
"What the hell is a Dub Chub?"
"Double Cheeseburger, man."