neck lettuce
The bushy overgrowth of hair on the neckline, typically indicating it's time for a haircut. A distant relative of the Kentucky Waterfall or the Mississippi Mudflap.
It's been 8 weeks since my last haircut; my neck lettuce is ripe!
Red neck lettuce
Chips when put on a sandwich to provide crunch instead of lettuce or other vegetables.
This sandwich could use a little red neck lettuce!