noun
poor communication skills; socially awkward
Colloquial abbreviation of コミュニケーション障害. Often used self-deprecatingly or to lightly tease someone who struggles with social interaction. Not a clinical term.
See also: コミュニケーション障害
自分はコミュ障だから、人と話すのが苦手だ。
I'm bad at communication, so I'm not good at talking to people.
あの人はちょっとコミュ障っぽいよね。
That person seems a bit socially awkward, doesn't he?