All America
noun
Do you remember how 米国 can mean "America?" That 米 means America sometimes. So, when you see all rice (I mean, America), you can think of this word as meaning All America (sort of like how 全日本 means "All Japan.").
ぜんべい
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
これは、全米がなみだした、大ヒットチョ～大作えいがです。
This is a mega-hit blockbuster that brought all of America to tears.
まつ山ひできは、2017年の全米オープンで二いに入った。
Hideki Matsuyama finished second at the 2017 U.S. Open.
全米ヒットチャートで今一位の曲は何ですか？
What's the No. 1 song on the U.S. hit chart now?