To razz someone means to tease them playfully, usually about something silly or embarrassing they did. When your teammates razz you for striking out in kickball, they're not being mean: they're joking around in a friendly way. You might razz your brother for wearing mismatched socks, or your friends might razz you for tripping over your own shoelaces.

The word carries a lighthearted feeling. Good-natured razzing happens between people who like each other and can laugh together. It's different from bullying or cruel mockery. When you razz someone, there's no real sting to it: you're just having fun at their expense for a moment, and they'll probably razz you right back when you mess something up.

You might hear razzing used as a noun, too: “I took a lot of razzing for forgetting my lines in the school play.” When you razz someone, it's like making a silly, rude noise with your words instead of with your mouth.