手刀

プログレッシブ和英中辞典(第4版)

てがたな【手刀】

手刀ですいかを割った
He split [chopped] open the watermelon with the side of his hand.

勝った力士は手刀を切った
The victorious sumo wrestler moved his hand through the air as a gesture of gratitude before accepting his prize money.

出典　小学館「プログレッシブ和英中辞典(第4版)」