Tiny, minute, microscopic, miniscule.
If something is extremely flammable it catches fire and burns very easily.
In the context I found it online, it means a very thin, wispy beard, one hardly big enough to be called a beard.
Stands out amongst others.
Famished
Guy's Mean Green Beans
How to Compute a Weighted Average
The Benefits of Home Births
Using Earth as the Main Building Material
