(idiom) something shouldn’t be minimized or ignored
Example Sentences:
A: How much was your trip to Vancouver, Chika?
B: It cost me about $3000.00.
A: That’s not too bad!
B: Well, it’s nothing to sneeze at! I spent all my savings.
When Mark was voted Teacher of the Year he was very proud, because the honour was nothing to sneeze at.
From the Blogs:
A Sick Day’s Nothing to Sneeze At
Media: