Definition of niggling for English Language Learners. : causing you to feel a slight pain or to be worried or annoyed for a long time.
What is PPAP? The Production Part Approval Process (PPAP) is a standardized process in the automotive and aerospace industries that helps manufacturers and suppliers communicate and approve production designs and processes before, during, and after manufacture.
The Home Purchase Assistance (HPAP) program provides interest-free loans and closing cost assistance to qualified applicants to purchase single family houses, condominiums, or cooperative units.