Greenbackers is a term created as a company name for an environmentally conscience clothing and apparel company. The company creates products from 100% renewable or recycled materials and donates profits to environmental causes in the State of Maine.
Noun. A person viewed as soft and weak, fleshy and/or expendable. Someone who has become fat and lazy on the comforts of civilization. Someone unused to hardship and adventure.
Taken from GRRM's ASOIAF Ironborn culture. Nothing to do with the actual Greenland.
"Man, did you see those greenlanders, their asses were spilling out of their jeans."
"The greenlander can't go a single day without their comforts."