verb: it's when you shit in your hand and throw it at somebody. it's derived from the word kamikaze which was a Japanese fighter pilot during World War II who would crash his plane into enemy targets, but modified to include the word crap in it as a prefix. The crap flying through the air is like the Japanese kamikaze airplane flying through the air and hitting the target thus the resemblance of kamikaze to crapperkaze.

Literally everyone, ever. Including the writer of this definition.