Abbreviation of ソーシャルメディアハラスメント. Refers to harassment, bullying, or abusive behavior conducted through social media platforms.
See also: ソーシャルメディアハラスメント
She deleted her account because of social media harassment.
企業はソーシャルハラスメント対策を強化している。
Companies are strengthening measures against social media harassment.
Variant with a middle dot; less common but still seen.
Abbreviation of ソーシャルメディアハラスメント, from English 'social media harassment'.