Shiny rock

When you are focused on doing something and all of a sudden you are distracted. When you are having a conversation and all of a sudden you are distracted or have a random thought.
Having a conversation with someone and noticing their "shiny" ring or jewelry, in which your focus suddenly becomes about their jewelry.

You are having a conversation with someone and all of a sudden "shiny rock" you change the subject to something completely random or different.

You are focused on doing something and all of a sudden "shiny rock" you randomly do something completely off track of that focus.

Shiny Rock

Someone that is really cute, but has a shit personality

(credits to Annie Marshall for this)

Wow he's super hot but he's just a shiny rock