wax lyrical

wax lyrical (third-person singular simple present waxes lyrical, present participle waxing lyrical, simple past and past participle waxed lyrical)

1. To speak very enthusiastically about something.
   • 1960 March, G. Freeman Allen, “Europe's most luxurious express - the "Settebello"”, in Trains Illustrated, page 142:

     Axe-grinding columnists and politicians are therefore disingenuous when they wax lyrical about the quality of the meals served on the Continent by the International Wagons-Lits Company (and in France, though not in Italy, I personally have not found the quality outstanding for the high price demanded) [...].

• “wax lyrical”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.
• “wax lyrical”, in Collins English Dictionary.
• “wax lyrical”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.