spiff
/spɪf/verb
with obj.(spiff someone/thing up)
- informal make someone or something attractive, smart, or stylish〈非正式〉把（某人, 某物）打扮漂亮（或时髦）：
he arrived all spiffed up in a dinner jacket.
他盛装穿着小礼服来了。
词源
late 19th cent.: perhaps from dialect spiff 'welldressed'.