تَدَرْدَرَ

It (a thing) was, or became, in a state of motion or commotion, or it moved about. (T in article دل.) And تَدَرْدَرَتِ اللَّحْمَةُ The piece of flesh quivered. (K.) [Hence,] one says of a woman, تَدَرْدَرُ, [for تَتَدَرْدَرُ,] meaning She quivers in her buttocks, by reason of their largeness, when she walks. (TA.)