Nope:
Lift your eyebrows or softly shake your head horizontally.
Yes:
Just nod and stress your head mostly toward your chest.
Hold on/ wait/ slowly:
Put your fingers together and shake it ups and downs.
Maybe/ not sure/ I am not sure:
Twist your head down and up with mouth squeezed.
Whatever/ I am not sure I care:
Lift your shoulders just once ups and downs.
Oh Lord:
Slam your face with your two palms open wide.
Oh god I forgot/ what an idiot I am:
slam your upper part of your head or your forehead.
Go away/ leave:
With your palm opened, shake it or twitch it to the outside against you.
Come along/ proceed/ come closer:
With your palm semi closed, shake it or twitch it to the inside toward your chest.
Why can’t you understand/ Mama-Mia:
Squeeze your fingers together, so the tips of your fingers are touching each other, then bring both hands toward your face and shake them ups and downs.