Lamar Odom's giving a whole new meaning to the nickname "dollface" ... 'cause he just ordered his own custom sex doll -- and, he wants it to look like his ex Khloe Kardashian!
The former NBA star went on a NSFW Willy Wonka-level tour of RealDoll's Las Vegas facility Tuesday ... full of totally nude female sex dolls hanging on hooks and huge realistic male organs -- and, Lamar got to touch everything in the facility.