also: クロックムッシュー
noun
croque-monsieur
A French-style grilled ham and cheese sandwich, often topped with béchamel sauce. Common in Japanese cafés and bakeries.
from French
カフェでクロックムッシュを注文した。
I ordered a croque-monsieur at the café.
このパン屋のクロックムッシュはベシャメルソースがたっぷりだ。
The croque-monsieur from this bakery has plenty of béchamel sauce.
A croque-madame is a croque-monsieur topped with a fried egg.
From French 'croque-monsieur'. The Japanese spelling reflects the French pronunciation.