1a) To be in the state of having something completely under control
1b) To be very
actively in the process of completing a task
2) To be very interested in something, typically an activity or person.
1a) "You been keepin' tabs on the
wordmack/
word down the street?"
"Yeah, 'm all over it"
1b)
"Hey Tobey, you got that DVD ripped for me yet?"
"Naw, but I'm all over it"
2)
"So dude, you interested in
snubbin' crackwhores again this weekend?"
"Hell yeah, I'm all over it!"