To be very worried or excited about something, often too much.
His grandmother will never quit fussing over his vegetarianism.
To fiddle; fidget; wiggle, or adjust
Quit fussing with your hair. It looks fine.
(especially of babies) To cry or be ill-humoured.
(with over) To show affection for, especially animals.
To pet.
He fussed the cat.
Excessive care; act of one who fusses.