I am surprised or annoyed by this.

For Christ's sake, Julie, what are you doing here?

This dress makes me look like a little old lady, for Christ's sake.

It's two in the morning, for Christ sakes! Why are you calling me now?

Usage notes: used for emphasis

Related vocabulary: for crying out loud, for goodness' sake, for Pete's sake

Etymology: based on the literal meaning of for Christ's sake (= in the name of or for Christ)

• not in the business of doing something
• not in the least
• not in the same league
• not in the slightest
• not judge a book by its cover
• not know beans about
• not know beans about something
• not know from Adam
• not know if are coming or going
• not know if you are coming or going
• not know someone from Adam
• not know the first thing about
• not know the first thing about something
• not know the half of it
• not know the meaning of the word
• not know what hit
• not know what hit you
• not know where to put
• not know where to put yourself
• not know where to turn
• not know whether are coming or going
• not know whether to laugh or cry
• not know whether you are coming or going
• not know which way to turn
• not let the grass grow under feet