Doing, or about to do, something in a very complete and expedient fashion.
Need someone to fix anything electronic? I'm all over it.
being in charge of the situation
fo shizzle nizzle.i can hizzle the situizlle so be rizzle
What? A green pinto with T.V.'s in the headrest? Hell yeah, I'm all over it.
taking care of it. handling your business.
Are you getting tickets to that game? Yo, I'm all over it.
A variation of the phrase "on it", e.g., ...on it like a fly on shit, ...on it like white on rice.
The last time I made a math error the IRS was all over it like a duck on a junebug.
Meaning, I'll take care of it and finish the task at hand thoroughly.
No problem dude, I'm all over it.
The person desires said thing/person. They plan to obtain/do it soon because it is good.
When Sally saw the gold crutch, she knew Little Timmy would be all over it.