thud thud; clump clump
Onomatopoeia for heavy, rhythmic thudding sounds, especially heavy footsteps or something large hitting the ground repeatedly. Similar to どしんどしん but with a slightly heavier, more resonant feel.
See also: ドシンドシン
I heard the sound of someone coming down the stairs with heavy thuds.
He placed the large boxes on the floor with a series of thuds.