What does it mean when they put their hand under there chin and wiggle their fingers in sign language?

In American Sign Language (ASL), placing a hand under the chin and wiggling the fingers typically represents the sign for "think" or "thought." This gesture conveys the idea of pondering or considering something. It's a visual representation of the cognitive process, emphasizing the act of thinking. As with many signs, context can influence the specific meaning, but this gesture is commonly associated with thoughtfulness.