まじか

まじか is a shortened form of まじですか (are you serious?) or まじかよ. It's become one of the most common casual expressions for reacting to surprising information.

Variations

• まじかよ (more emphatic, often male speech)
• まじで (seriously - can be question or statement)
• マジ (often written in katakana)

Origin: まじ (also 真面目(まじめ) abbreviated) meaning "serious"

Usage context

• Very casual, avoid in formal situations
• Common in texting and social media
• Used across all age groups but especially younger speakers