well, i found out that scarce means a lot less and hens have no teeth sooooo it sorta means less than nothing so it would also mean highly unlikely
An idiom is a rendition of a combination of words that have a figurative meaning. Most idioms have no clear "inventor".
Few things are as scarce as hen's teeth.
hen's teeth
When money is scarce, you may need to use some of your savings.
Snakes legs with a side of powered hens teeth, and ape tails.
yes they do but they are like hens teeth.
This is not an idiom, so it means what it says. Something is as rare or hard to find as teeth on a female chicken (or any chicken) - chickens are birds, and do not have teeth.
Scarce
When money is scarce, you may need to use some of your savings.
Here are two sentences for the word 'scarce': "Food in the town was scarce because there was little money and no shops." "John's attendance for morning lessons was scarce because he never got out of bed in time."
No living birds have teeth as adults, some have an "egg tooth" but it's not for biting or chewing, it's to break their shell so they can hatch. Prehistoric birds did have teeth, some were quite impressive. Birds do not have teeth, although some species of geese have tooth-like serrations called 'tomia' which run along the outside of the top and bottom of their bills, and look very much like teeth.