all about it

1.A positive response to a question or suggestion.

2.An expression of joy.

3.An expression to convey a fascination or extreme intrest.

"Are you ready to go?" "I'm all about it!"

"Do you want some pizza?" "Oh, I'm all about it."

"Did you see that hottie?" "Man, I'm AAAAAAALLLLLL about it!"

All About

To like something, as in a lot.

James is all about Lucy.

all about that

in complete support really like something

Women's rights? I'm all about that.

I'm all about that outfit.

all about

- Extreme like, infatuation or love of something or someone.

Jen is all about Ben.

all about

an indication that one is enthusiastically for a certain thing

"You want to go to the beach?"
"Hell yeah! I am ALL ABOUT htting the surf!"

all about

To like or have knowledge about a topic or thing.

"You like pizza?"
" Yeah, I'm all about pizza."
or
"I'm all about computers!"

all about

used to show that someone has a great knowledge of or great interest in the subject in question, often preceded by the word basically.

child labor, basically that’s what i’m all about.