The phrase "butt naked" is often used to describe someone who is completely devoid of clothing. However, there are many synonyms that can be used instead of this phrase. Some common ones include "naked as a jaybird," "stark naked," "au naturel," "in the buff," and "bare-assed." Each of these phrases has its own connotations and can be used in different contexts. For example, "naked as a jaybird" may be used to describe someone who is particularly vulnerable or exposed, while "in the buff" may be used in a more lighthearted context. Regardless of the phrase used, it is clear that the person being described is completely without clothing.