expression, godan verb (-ku)
fall on one's backside; land on one's rear
Describes falling backwards and landing on one's buttocks, often with a sense of clumsiness or suddenness. Commonly used in the phrase 尻餅をつく.
凍った道で尻餅をついてしまった。
I slipped on the icy road and fell on my backside.
子供が滑り台から落ちて尻餅を
The child fell off the slide and landed on his rear.