The conjunction of the words Amazing, perfect and happiness. It is most often used to describe the state of true bliss that only occurs through the realization of who your better half is and acknowledging that you are going to spend the remainder of your days with them. This word's definition is the apex of happiness that is only possible through the giving and recieving of true love.
Chris: Rachel, i love you.
Rachel: OMG baby i love you too!
Chris: You make me higher than the clouds, brighter than the moon, and stronger than a tidal wave. What we have is amazperfectness.
Rachel: You make me feel the same way. I can't wait to be yours forever.
The Hatmaker effect is what happens when a guy falls hard for a girl that is gorgeous, funny, sweet and just all around amazperfectness. Once the Hatmaker effect has taken ahold of you i would advise to just let it happen. Side effects include deep emotions for a girl, wanting to do something special for them as much as possible, loss of appetite, constant dreams of her, and perhaps on rare occasions the sharing of a furry friend between you and a girl. The Hatmaker Effect has no cure and will stay with you until the end of time.
Christopher: Bro i cant eat and i have been having these weird dreams about a girl. Whats wrong with me?
Luke: It sounds like the Hatmaker effect to me bro.