Green’s Dictionary of Slang

rhyme slinger n.

a poet.

1890		Sporting Times 18 Jan. 5: ‘What do you think?’ replied the budding rhyme thumper. ‘One’s without the slipper, and the other’s with it.’.
1900		‘Doss Chiderdoss’ ‘Founded on Fact’ Sporting Times 5 May 1/4: The roses, the registered roses, / Of which the spring rhyme-slinger speaks, / And which settle on some people’s noses, / Were still to be found on her cheeks.
1915		M.G. Hayden ‘Terms Of Disparagement’ in DN IV:iii 208: rhyme-slinger, poet of little repute. ‘We have more rhyme-slingers than great poets today.’.