Learn Turkish: Adam saçını kurutup jöle sürüyor. - The man is drying his hair and applying hair gel.

The ending -up is a connecting suffix that links two actions done by the same person, replacing the word "and" (ve). Instead of saying kurutuyor ve sürüyor (he is drying and he is applying), you attach -(y)ıp/ip/up/üp to the first verb. The first verb then automatically shares the tense of the final verb (sürüyor).

Why is it saçını and not just saçı?

saçını has two endings! First is the possessive -ı for "his" (saçı = his hair). Second, because his hair is the specific thing receiving the action of being dried, it needs the accusative case. We add the buffer letter -n- followed by the accusative -ı, resulting in saçını.

Does sürüyor mean "driving" here?

No, sürmek is a very flexible verb! While it means "to drive" when talking about vehicles, it also means "to spread", "to rub", or "to apply" when talking about things like cream, butter on bread, or hair gel (jöle).

Where does the word kurutup come from?