noun
junk card; plain card; 1-point card
In hanafuda, the lowest-value cards, worth 1 point each. Often called 'kasu' for short.
花札では、カス札は1点の価値しかない。
In hanafuda, junk cards are worth only 1 point.
手札にカス札ばかり来てしまった。
I ended up with nothing but junk cards in my hand.