いっちょうら
one's only good clothes (suit, dress, etc.); one's only suit of clothes; one's best clothes; one's Sunday best
Also written 一帳羅、一丁羅
Noun
今日こんにちは俺おれの一張羅いっちょうらの服ふくを着きてきたんだ。
I'm wearing my best clothes today.
トムは、就職しゅうしょくの面接めんせつに一張羅いっちょうらのスーツを着きていった。
Tom wore his best suit to his job interview.