rim ram ruff
/ˌrɪm ram ˈrʌf/(also rum ram ruf, rim ram ruf)
noun
Alliterative verse of this kind, especially considered as unsophisticated; (hence) crude or clumsy poetry. Also: the effect of this kind of poetry.
Origin
Late Middle English (in an earlier sense). Probably imitative of the effect of alliterative verse. Perhaps compare French regional (Walloon) rim ni ram rhyme nor reason, rim-ram protocol, formalities.