all of sudden

突然。※口頭ではsuddenlyより使われる

Ex

• She’s ignoring me all of sudden.
• All of sudden, people started running away.

Reference source

• http://xn--6oqqk959cr20al3h.xn--ccks5nkbz150dj5j.net/phrases/all_of_a_sudden.html
• http://native-phrase-blog.com/all-of-a-sudden-：突然/