A woman with an oral fixation involving a man's penis, to a fault. Where in, your dick almost never leaves her mouth. She will suck it and suck it and suck it and will never tire...
"Last night my girlfriend gave me roadhead . After I finished, in her mouth, she sucked me dry till we got home; 3 hours later...She is totally The Everlasting Knobslobber!"
Someone or something that bites your ankles.
To a postman, an ankle biter is often known as a dog.
To an adult, an ankle biter may be a toddler.
To hikers, an ankle biter is sometimes a tick.
And so on.