A: Dana waxed lyrical about the dinner I made, describing it as “sublimely scrumptious,” though I knew it was not that great.

B: She could have been a very successful saleswoman.

Note: This idiom means “to speak about something enthusiastically, especially by employing elegant language.” There are similar idioms, like “wax eloquent” (talk about something eloquently), “wax poetic” (talk about something in flowery speech) and “wax wroth” (talk about something angrily or with agitation). The intransitive verb “to wax” is normally seen in the sense of increasing, as “the moon waxes and wanes in its cycle.” But “to wax” also means “to become, to grow towards.” “Lyric” comes from the classical instrument, the lyre, and means a “short poem expressing personal emotion.” So literally the idiom means “to grow in poetic and emotional speech.”