na-adjective
very lovely; extremely nice; absolutely wonderful
Rare emphatic expression combining 素敵 (lovely) and 滅法 (extraordinarily). Used for strong praise, but not common in modern everyday speech.
この景色は素敵滅法だ。
This scenery is absolutely wonderful.
彼女のドレスは素敵滅法だった。
Her dress was truly splendid.
Compound of 素敵 (suteki, 'lovely') and 滅法 (meppō, 'extraordinarily'). The exact origin is uncertain; it appears to be a rare emphatic formation.