What is another word for bellyflopping?
Pronunciation: [bˈɛlɪflˌɒpɪŋ] (IPA) 
"Bellyflopping" is a term used to describe the act of jumping into the water with one's stomach hitting the surface first. However, there are several synonyms for bellyflopping that are commonly used. Some people refer to it as "planking," while others use the term "pancaking." Some people call it "whale-tailing," while others say "belly buster." Another popular term is "cannonball," which refers to the way one's body seems to explode into the water upon impact. Regardless of the term used, bellyflopping is a fun and exciting activity enjoyed by swimmers of all ages.
