lop-eared
US /ˈlɑːp.ɪrd/
UK /ˈlɑːp.ɪrd/

1.
having ears that droop or hang down, rather than standing erect
:
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The cute lop-eared bunny hopped across the field.
•
Many breeds of rabbits are known for their lop-eared appearance.
having ears that droop or hang down, rather than standing erect