尻をまくる
1
to suddenly assume an antagonistic attitude;to suddenly become defiant;to turn aggressive (in one's manner)
2
to moon;to point one's naked buttocks at someone;to give someone the brown-eye
Other forms
穴を捲る 【けつをまくる】 · 尻を捲る 【けつをまくる】 · ケツを捲る 【けつをまくる】 (search-only kanji form) · けつを捲る 【けつをまくる】 (search-only kanji form)