expression
let's drop the formalities; let's not be so stiff
A casual, friendly phrase used to encourage relaxed, informal conversation. Often said when people are being too polite or reserved.
初対面だけど、かたいことは言いっこなしでいこう。
It's our first meeting, but let's drop the formalities.
かたいことは言いっこなしにして、ざっくばらんに話しましょう。
Let's not be so stiff and talk frankly.
A set phrase combining かたい (stiff, formal), こと (things), 言いっこ (from 言う + reciprocal suffix っこ), and なし (without). Literally 'no saying stiff things to each other'.