Commonly used to describe someone who has lost teeth.
El perro chimuelo no podía morder, pero aún así jugaba felizmente.
The toothless dog couldn't bite, but he still played happily.
El niño chimuelo sonreía felizmente, a pesar de no tener dientes para morder la manzana.
The toothless boy smiled happily, despite not having teeth to bite the apple.