わ割waりriこ込koむmu
1.
To forcibly enter a line or group, disregarding established social norms or etiquette, often leading to interruptions or disruptions in ongoing interactions.
2.
To intrude into a conversation or setting at an inappropriate moment, asserting oneself without consideration for the current participants or their exchanges.
3.
To reduce the value of a market price by entering or influencing it in a way that pushes it below a certain threshold.
Example:
人の話に割り込むのは失礼だぞ。