scarce as hen's teeth
Also, scarcer than hen's teeth. Exceptionally rare, as in On a rainy night, taxis are as scarce as hen's teeth. Since hens have no teeth, this term in effect says that something is so scarce as to be nonexistent. [Mid-1800s]
Words nearby scarce as hen's teeth
scarabaeus,
scaramouch,
scarborough,
scarborough lily,
scarce,
scarce as hen's teeth,
scarcely,
scarcely ever,
scarcement,
scarcity,
scare