What does ‘Dunno’ mean?

Simply speaking, dunno means ‘I don’t know’. It’s a quicker and lazier way of saying it and it’s very popular among young people. However, do be careful who you say this to – if you say it to someone in a higher position than you it could come across as rude. So to play it safe just use it around people your own age or younger.

Example 1)

“Where’s Jane? She’s supposed to be here by now.”

Dunno, she’s always late!”

Example 2)

“What are you doing for Spring Break?”

Dunno, I was thinking Mexico again. You?”

Dunno yet!”