This is the 6777th most frequent Japanese word.
ファイブガイズ
"Five Guys" (a hamburger restaurant chain).
The term 'ファイブガイズ' (Five Guys) here refers to the name of the restaurant where the speaker dined.
昨日、友人と一緒にファイブガイズで食事をしました。
Yesterday, I had a meal at Five Guys with my friend.
The word 'ファイブガイズ' is used to denote the restaurant and is described as a popular chain focusing on hamburgers.
アメリカの人気チェーン店であるファイブガイズはハンバーガーが有名です。
Five Guys, a popular chain in America, is famous for its hamburgers.
Here, 'ファイブガイズ' signifies the brand of the food the speaker intends to try.