catchphrase

A repeated expression, often originating in popular culture.

Frequently, catch phrases are not, in the grammarians' sense, phrases at all, but sentences. Catch phrases, like the closely linked proverbial sayings, are self-contained, as, obviously, clichés are too. Catch phrases are usually more pointed and ‘human’ than clichés, although the former sometimes arises from, and often they generate, the latter. Occasionally, catch phrases stem from too famous quotations.

For Tigger, he created a slight lisp and laugh, crediting his British wife with Tigger's "TTFN" catchprase - "ta-ta for now", itself coming from BBC radio comedy It's That Man Again.

A signature phrase of a particular person or group.

Instead, bro country songs string together a formulaic subset of tropes about beer sipping, truck driving, sunglasses wearing, unpaved roads, and tanned girls in shorts, typically building to a predictable catchphrase singsong chorus.