Noun referring to the song of a whippoorwill or whip-poor-will (type of bird, also known as tapacamino), whose 'Iipay name is uuluwk in Barona or taawaak in Mesa Grande.
Tuwluwk in Barona, also recorded as tuuluwk.
Mesa Grande dictionary: tawluwk: "(sound of) whippoorwill; Rattlesnake's grandmother, when you hear it, rattlesnakes are out."