"Guitguit" is a word in ENGLISH, CEBUANO

One of several species of small tropical American birds
of the family Coerebidae, allied to the creepers; -- called also quit.
See Quit.

guitguit n layers of dirt on the body, teeth.
Ang guitguit sa íyang líug katamnan ug sibúyas, You could plant onions in the layers of dirt on his neck.
v [BN; b6] become covered with layers of dirt.
Ang íyang ngípun giguitguitan (nangguitguit) sa talìtì, His teeth are thick with tartar.