expression, godan verb (-su)
insist on one's own ideas; assert oneself; push one's own way
Used when someone stubbornly insists on their own opinion or way of doing things, often in a group setting. Can carry a negative nuance of being self-centered or uncooperative.
会議で彼は我を出して、自分の案だけを押し通そうとした。
At the meeting, he insisted on his own ideas and tried to push through only his own proposal.
When working in a team, it's better not to assert yourself too much.