In the nude
Definition 1 of 1
Pro Tip 1/3Cultural Sensitivity
In some cultures, 'in the nude' suggests taboo or shock. Know your audience before using. 
In conservative societies, being seen in the nude can cause uproar.
Pro Tip 2/3Privacy Expected
'In the nude' is generally private and personal. It's not common in public settings. 
She was surprised to find her roommate walking around the apartment in the nude.
Pro Tip 3/3Informal Setting
'In the nude' is casual and might be inappropriate in formal contexts. 
He joked about painting his self-portrait in the nude.