48

It means HU-Hit Up, as in Nokia style early text code 48. Also, 468 means HMU-Hit Me Up.

Yo, 48 so-n-so cuz they asking about you.

48

To confuse a target with words/actions; that allow you to blend in for the time being.

I'm bouta 48 this nigga; he think I'm one of his guys

lower 48

Nickname for a topographical map wif a certain number of irregular-shaped sections dat you can literally color all different separate hues by using each and every one of da wax sticks from Crayola's famous tall-cube-shaped box.

Including a good-sized "lower 48" page together wif a next-to-da-largest common set of crayons is an excellent way to let da young recipient of said lovely gift easily and sensibly try out all of da assorted colors in da box right away, since he/she will merely need to fill in one section apiece wif each of da markers, effortlessly ensuring da resulting "patchwork quilt" effect will be pleasing on da eyes for anyone who views said child's artwork afterwards. Extra points if you thought to pre-mark each map-sector wif an appropriate color-directive, so dat da budding artist will know how to fill them in wif appropriately-alternating light/dark/pale/bright hues to create maximum contrasts and even colors-distribution among da various sections.