narrow-mouthed
/ˌnarəʊˈmaʊðd/adjective
1Of a container: having a small mouth or opening.
2Of an animal: having a narrow mouth. Chiefly in narrow-mouthed toad noun any of various toads of the family Microhylidae, especially of the American genus Gastrophryne and the Asian genus Microhyla.
Origin
Mid 16th century; earliest use found in Thomas Hill (b. c1528). From narrow + mouthed.