n.名詞彈出式廣告I keep getting annoying popups when I visit that website.
n.名詞立體書My daughter loves popup books because they are interactive.
n.名詞彈出式選單Right-clicking on the desktop brings up a popup menu with various options.
adj.形容詞快閃的The popup shop will only be open for a week.
n.名詞快閃活動The popup event was a great success.