Bonkle (ぽかすか Boka suka) is a technique used by Charlotte in Seiken Densetsu 3. She learns this tech by default in her starting Cleric class. This tech allows Charlotte to literally bonk all foes present within a small radius in front of her for mediocre amounts of damage when her attack gauge meter turns green in color.
Charlotte will start off by swinging her flail above her head. She then swiftly follows up by thrusting the flail onto the ground and swiping it in a horizontal direction in front of her body.