Shey you dey whine me ni? meaning in English. It Simply means Are you joking with me? or Are you messing with me? in English. It's a casual Nigerian Pidgin expression often used to asked if someone is being serious or just joking.
Examples
1. Friendship context:
A friend promises to pay you back today but keeps delaying.
"You say you go pay me today. Shey you dey whine me ni?"
2. Surprise context:
Someone offers you a ridiculously low price for your expensive phone.
"This phone na 200k. You dey talk 20k. Shey you dey whine me ni?"
3. Joking context:
Your sibling says they saw a celebrity in your small village.
You say Davido dey my village? Shey you dey whine me ni?
4. Disbelief context:
Your colleague claims they finished a 2-week task in 2 hours.
You finish am for 2 hours? Shey dem dey whine me ni?"
5. Sarcastic context:
Your friend jokingly says they'll buy you a private jet.
Private jet? Shey you dey whine me ni?"