Green’s Dictionary of Slang

snazz up v.

[snazz n.]

(US) to enliven by making something smarter and more attractive.

‘News’ Press of Atlantic City 17 Oct. 🌐 And on the way out of the decked-out Atlantic City Convention Center room, they got door prizes: clear beer mugs, snazzed up with tiny flashing lights – turned on, of course – and printed with that electric slogan.