A sly or sinister smirk. While a real smile conveys warmth, this smile is given to hide evil intent. Popular with politicians, crooks, and phony friends.
Similar to "Crocodile Tears", exaggerated sorrow or fake tears, a crocodile smile is usually given by someone with an ulterior motive.
Joe: So, you need a loan to fix your car?
Barry: Yeah, things are rough.
Joe: What's with the "Crocodile Smile"? Is there something you're not telling me Barry?
Person 2: I ain't your brother. Fuck you and your crocodile smiles.
1 minute goes by...
"Why are you looking at me like that?"
Tim maintained eye contact with a hint of a crocodile smile