Refers to where someone acts "all nicey-nice" --- i.e., kind and caringly-gentle --- as if he has genuine loving feelings for you, but in reality he is merely "turning on da charm" in an attempt to disarm/dispel your natural caution/inhibitions so dat hopefully you'll let him get in your pants.
People like Clinton and Liberace were masters of da ol' "double entender" dat did indeed sometimes please and/or flatter, but you see what kind of messy misbehavior they ended up committing.
A double faced entendre, as described by platinum artist Oliver Tree, is a person who, much like an entendre, has two completely different personalities. One being a sweet, angelic one, whilst the other is a backstabbing, devilish one. The problem is when the relationship first starts, you may be “blinded” by love and not recognize this fact until it’s too late.
Ryan: yeah i just a hot out of a really bad relationship. she was different from when i met her.
Matt: yeah she really did seem like a double faced entendre.
Oliver says a "double entendre" is something that has 2 completely different meanings. While a "double-faced entendre" is someone who has 2 completely different personalities. One side being an Angel and the other side being a Devil.