noun, na-adjective
bad at socializing; poor social skills
Describes a person who is awkward or uncomfortable in social situations, often used self-deprecatingly.
私は交際下手で、パーティーに行くのが苦手です。
I'm bad at socializing and not good at going to parties.
彼は交際下手だから、友達が少ない。
He has few friends because he's a poor mixer.
Compound of 交際 (kousai, 'socializing') and 下手 (heta, 'unskillful').