渋しぶ茶ちゃ

noun

strong green tea; bitter green tea

Refers to green tea that is strongly astringent or bitter, often due to over-steeping or low-quality leaves. Not a negative term per se; some people enjoy the robust flavor.

• この店みせの渋しぶ茶ちゃは、苦にが味みが強つよくて大人おとなの味あじだ。

  The strong green tea at this shop has a pronounced bitterness and a mature flavor.