"r u for real?"

• "For realz" [the American Values Club puzzle is at avxwords.com]
• "Are you kidding me?," in texts
• "r u kidding me?!"
• "4 realz"
• “wait, wut??”
• Possible follow-up to "OMG!"
• "R U 4 real?"
• Possible "OMG!" follow-up

Wiktionary Word definitions in Wiktionary
adv. (context internet slang English) In a serious manner. interj. (context internet slang English) Are you serious? really?