What is "abcho"

Abcho (typeset as ABCHO, meaning Abstract Chop), is a Japanese pop unit made up of two members from Japanese pop groups Morning Musume, their subgroup which includes Older/Graduated Members, Dream Morning Musume, and J-Pop Metal Group Hangry & Angry: Hitomi Yoshizawa and Rika Ishikawa. They formed in middle of February 2012, and released their first single on May 23, 2012.