To sign 'dumptruck,' start by holding your non-dominant hand flat in front of you with the palm facing down. Place your flat dominant hand directly on top of it, also palm down. Hinge your dominant hand upward from the wrist so your fingers point up, then lower it back down, repeating this motion twice to mimic a dump truck's bed tilting to empty its load.
Sign 'dumptruck' using the hinging motion, then point to your ear and shake your hands to sign 'loud'.
Point your index and middle fingers toward your eyes and then outward for 'look,' sign 'big,' and finish with 'dumptruck'.
Sign 'dumptruck,' use both hands to show holding and moving something for 'carry,' and then rub your thumb against your fingers under your chin for 'dirt'.
Sign 'dumptruck' using the hinging motion, then point to your ear and shake your hands to sign 'loud'.
Point your index and middle fingers toward your eyes and then outward for 'look,' sign 'big,' and finish with 'dumptruck'.
Sign 'dumptruck,' use both hands to show holding and moving something for 'carry,' and then rub your thumb against your fingers under your chin for 'dirt'.
It is not strictly necessary. The visual action of the dumping bed is usually enough to convey 'dumptruck' in context, though some signers might choose to sign 'truck' first for extra clarity.
Typically, you repeat the upward hinging motion two times. In ASL, repeating the motion often helps establish the sign as a noun (the truck itself) rather than a verb (the action of dumping).
While the motion is visually similar, this specific sign with the hand resting on the other is generally used for the vehicle. To sign the verb 'dump,' you would typically use two hands mimicking holding a container and turning it over.
