Wiktionary( / 1 vote)Rate this definition: cuckoo for Cocoa Puffs(Adjective). Crazy, insane, irrational. Etymology: Catchphrase of Sonny the Cuckoo Bird, the. a strictly medical term, used to describe a patient or person that has delved into a realm of irrational, illogical and/or crazy thought processes; Affected with. Shimmy shimmy cocoa what Listen to it pound Light it up and take a puff, pass it to me now You can find me in St. Louis rolling on dubs Smoking on dubs in. | Yahoo Answers; Tee Luv - Tee Luv Im Cuckoo for Cocoa Puffs Cereal T; Codependency & Coo-Coo for Cocoa Puffs | ACEsConnection; Urban Dictionary: coocoo.