
1) Amateurish dive 2) Awkward dive into a pool 3) Cause of a big splash 4) Clumsy dive 5) Dive gone awry 6) Flat dive 7) Hardly a swan dive 8) Horizontal dive 9) It creates a big splash 10) It often causes a big splash 11) Make a big splash 12) Painful dive 13) Sloppy dive 14) Slang for a total failure
Found on
https://www.crosswordclues.com/clue/bellyflop

Bellyflop is slang for a dive landing stomach-first on the water.
Found on
http://www.probertencyclopaedia.com/browse/ZB.HTM
No exact match found.