also: ふでぐせ
noun
handwriting habits; idiosyncrasies in writing
Refers to the distinctive, often unconscious, personal traits in one's handwriting, such as stroke order, pressure, or character shapes.
彼の筆癖はとても個性的で、すぐに誰の字かわかる。
His handwriting habits are very distinctive, so you can tell right away whose writing it is.
noun
style of writing; style of painting
A broader sense referring to the overall artistic or calligraphic style, not just unconscious habits. Can apply to both writing and painting.
この書道家の筆癖は、力強く流れるような線が特徴だ。
This calligrapher's style is characterized by powerful, flowing lines.
Compound of 筆 (fude, 'brush') and 癖 (kuse, 'habit'). The reading ふでぐせ is a rendaku variant.