Ways That the Indian Head Wobble Is Used In essence, the head wobble is the non-verbal equivalent of that multipurpose and omnipresent Hindi word achha. It can mean anything from"good" to"I understand' The most common use of the head wobble is to respond in the affirmative. For example, if you ask someone if the train is going to your destination and they wobble their head in reply, it means"yes". The head wobble is also often used as a sign that what's being said is understood. For example, if you tell someone you'll meet them at a certain place at 5 o'clock and they wobble their head at you, it means that it's fine and they'll be there.