• Expose (oneself) vulnerably
• Expose (someone's) mistakenness
• Expose (someone's) true colors
• Expose (someone's) untruths
• Expose (someone) as a backfriend
• Expose (someone) as a brainlet
• Expose (someone) as a fourflusher
• Expose (someone) as a misrepresenter
• Expose (someone) as an ignoramus
• Expose (someone) to danger