noun
internet tough guy; keyboard warrior
Derogatory internet slang for someone who acts tough or aggressive online but is unlikely to behave that way in real life. Often used on forums and social media.
あの掲示板には硬派厨が多くて、すぐに喧嘩腰の書き込みをする。
That forum has a lot of internet tough guys who immediately post aggressive comments.
彼はネットでは硬派厨だけど、実際に会うととても大人しい。
He's a keyboard warrior online, but when you meet him in person he's very meek.