Buck Naked versus Butt Naked

What is the Difference Between Butt Naked and Buck Naked?

When to Use Buck Naked

The phrase buck naked means completely unclothed. You are buck naked when you take a shower, for example, and babies are born buck naked.

When to Use Butt Naked

Butt naked is an alternative version of the same phrase. In some ways, it the more intuitive form: if you are completely naked, your butt is showing. You are, therefore, butt naked.

Summary

Is it butt naked or buck naked? Buck naked and butt naked each mean completely unclothed.

Buck naked is the older term that predominates in published writing.

Butt naked is common in spoken, informal English.