An artificial smile that resembles the forced smiles of beauty pageant contestants. Women entered in these contests will put vasoline on their teeth to keep their lips from sticking to their teeth when they smile.
The Miss America contestants flashed their best vasoline smiles at the judges as they walked by.
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.