1. most fake, false, or insincere; superlative form of phony
Usage: informal

Examples

• That was the phoniest smile I’ve ever seen.
• His excuse was the phoniest thing I’d heard all day.
• She gave the phoniest performance in the entire play.
• The phoniest people often try the hardest to impress others.
• That company has the phoniest advertising campaign on television.
• His phoniest trait is pretending to care about causes he knows nothing about.