noun
waiter's friend; sommelier knife; waiter's corkscrew
A folding corkscrew tool used by sommeliers and waiters, typically including a knife blade for cutting foil.
ソムリエナイフでワインのコルクを抜く。
I open a wine bottle with a waiter's friend.
彼はポケットからソムリエナイフを取り出した。
He took a sommelier knife out of his pocket.
Variant with a middle dot; less common but still seen.
A simple corkscrew, while ソムリエナイフ is a multi-tool that includes a corkscrew and a foil cutter.
Loanword from English 'sommelier knife', combining 'sommelier' and 'knife'.