「スプリームで全てを買ってしまった。」（すぷりいむで・すべて・を・かって・しまった。） [su-pu-rii-mu-de su-be-te-oh kah-teh-shi-mah-tah]. 買ってしまう（かってしまう）[katte-shi-ma-u] is one way to explain something was done to fullness, completion, with thoroughness, or down to the proverbial last drop. If it is unclear to your speaker that "Supreme" is the name of a store, we can elaborate on what Supreme is by saying: 「スプリームという店で…」（すぷりいむというみせで） [su-pu-ri-i-mu to-yuu-mi-seh-de] "At the store called Supreme..." in order to explain the name of where the purchasing took place.