highly cursive style; grass style
Refers to the most flowing, abbreviated style of writing Chinese characters (kanji), often used in calligraphy and informal handwriting. Compare with 草書 (sōsho), which is the same concept but without the 体 suffix.
See also: 草書
A letter written in grass style is hard to read.
Compound of 草書 (sōsho, 'cursive script') + 体 (tai, 'style/form'). The term 草書 itself comes from Chinese cǎoshū, literally 'grass writing', referring to the flowing, abbreviated strokes.