suffix
Suffix forming nouns meaning a doctrine, movement, or characteristic quality. Attaches to words ending in き, し, り, etc., often in casual or trendy coinages.
See also: イズム
最近の若者の間では「自分らしさズム」が流行っている。
Among young people lately, the '-ism' of being oneself is trendy.
彼の行動は完全に「マイペースズム」だね。
His behavior is totally 'my-pace-ism', isn't it.