What does 'no biggie' mean?

What it means: "It's not a big problem" or "don't worry about it." Used to reassure someone that something they're apologising for, or something that went wrong, isn't a major issue.

"Sorry I'm late." "No biggie."

Why natives say this: "Biggie" is a diminutive of "big deal" — making the word itself smaller and more casual. It's warmer and more informal than "it's fine" or "no problem."

• "No big deal" — the longer version
• "It's nothing" — British English
• "Don't worry about it" — universal
• "No worries" — Australian/British
• "It's all good" — American, casual

Register: Informal. Works between friends, casual colleagues, or in low-stakes situations. Wouldn't use it in a professional apology to a client.

Tags: American English, reassurance, informal, no problem