Hi.Ash blonde, his favorite blonde of all. Barbie offered his most engaging smile. The girl driving the pickemup responded with one of her own, and oh my Lord if she was a ticktock over nineteen, he’d eat his last paycheck from Sweetbriar Rose. Too young for a gentleman of thirty summers, no doubt, but perfectly street-legal, as they’d said back in the days of his cornfed Iowa youth.
This is Under the Dome by Stephen King. What does to eat one's paycheck mean? To spend it, perhaps?
Context: He, Barbie, decided to leave the town and was on his way out of it when he heard a car coming along the road behind him.
He wished the driver would pick him up, and when he looked, he saw a blonde woman behind the wheel of an old Ford pickup.
Thanks in advance.