diddy
n. C2 Proficiency US //ˈdɪdi// did·dy
n. a short, simple song that is easy to sing and remember. It is often used for children or to teach a new idea in a fun way.
n. a short, simple, and catchy song, typically used for children or to convey a specific message in an accessible manner. Often used in the context of nursery rhymes or educational jingles.
The children sang a little diddy about the alphabet.
The teacher used a catchy diddy to help the students remember the names of the planets in order.
While the lyrics of the diddy were simple, they served as an effective mnemonic device for the complex mathematical formula that followed.