Waver
/ˈweɪ.və(ɹ)/
noun
An act of wavering, vacillating, etc.
Someone who waves, enjoys waving, etc.
“I felt encouraged by all the enthusiastic wavers in the crowd.”
Someone who specializes in waving (hair treatment).
verb
To sway back and forth; to totter or reel.
“Flowers wavered in the breeze.”
To flicker, glimmer, quiver, as a weak light.
To fluctuate or vary, as commodity prices or a poorly sustained musical pitch.