Here are some translations from english to urdu 
u r welcome
Check this out, man!
- Iskee chaanbeen karo, aadmi!
Have a nice day!
- Accha din lo!
What’s up?
*Uppar kya hai?
You’re kidding!
*Tum bachcha bana rahe ho!
Don’t kid me!
- Mera bachcha mut banaao!
Yo, baby! What’s up?
- Beti Yo, uppar kya hai?
Cool man!
- Thandaa aadmi!
Don’t mess with me, dude.
- Mere saath gandagee mat karo, ek hustee.
She’s so fine!
- Woh itnee bedaag hai!
Listen buddy, that chick’s mine, okay!?
- Suno dost, woh choozaa mera hai, theek?
Are you nuts?
- Kya aap akhrot hain?
Son of a gun.
- Bachcha bandook ka …
…
seriously i don’t think litterate translation work btw urdu and english;)