HSK 7–9 grammar · adverb
蛮
蛮 — quite, pretty (colloquial)
Pattern
+ +
( ) can be left out · other words may come before, between and after
How it works
蛮 is a casual spoken degree adverb, "quite / pretty", very common in southern Mandarin. It usually takes a final 的: 蛮好的. It is friendlier and less formal than 很, and much less formal than 颇.
Examples
这家店的菜蛮好吃的。
Zhè jiā diàn de cài mán hǎochī de.
The food at this place is pretty good.
他普通话说得蛮不错。
Tā pǔtōnghuà shuō de mán búcuò.
He speaks Mandarin quite well.
Related

See it in a story
In the app, 蛮 is underlined wherever it appears in the stories you read, and practised with sentences from them. Free.