Dull, flat; lacking in spirit or energy, listless; inactive.

Sad, melancholy, out of spirits.

Of a sound: dull, flat, hollow. Now somewhat rare.

Of a day, etc., with regard to its weather: dull, overcast; hazy. Compare "duff".

Of vegetable matter: decayed, rotten, lacking the kernel or substance. Compare "deaf nut", "duff".

A dull blow, typically the result of striking with something soft; the sound made by such a blow; a thud. Also in "to play dowf": to thump. Compare "duff", "doof", n.2.

To thump, buffet, punch, or strike (someone or something), especially with a soft object or substance. Also without object. Frequently with down. Occasionally also without object: to land with a thud.