Learn English – What do you call the gesture of raising both hands while shrugging your shoulders

Oaf means someone who is clumsy and foolish, but doesn't say anything about intent or how others perceive the person. A lovable oaf is more specifically what you mean, but of course isn't a single word.

Come to think of it, buffoon is really close, but maybe a bit more insulting than your intent.

I call it dusting your hands together