48, 48ing, 48ed, also known in full as the "48 Degree Experience" is when two platonic friends decide to do a naked trail run together. 48 is the ideal temperature for such a run to take place and a comfortable ambiance for clothes to come off in. 48ing is notorious for resulting in these friends "taking things to the next level". In fact, it is said that although these friends are running, an equal amount of baseball is played that night. ;)

A 48, or forty-eight is a type of freight train car that usually holds the same containers you would see an 18 wheeler pulling?minus the wheels of course. The forty eight looks like a gondola and sometimes has the numbers 48 painted on the side of the car. Besides railroad workers?train hoppers and graffiti artists are probably the only people that would know or care what a "48" was.

FOB Fesh off the Boat. 48 also stands for the FOB gang.

to smoke and/or blaze it up, stoned, to have fun and get fucked up.

Anal sex.

See the part of the number “4” that protrudes to the right? That’s the penis and it’s about to penetrate the cleavage of number “8,” which is the ass. Buttfucking.

48 could also reasonably represent fucking your girl’s tittie cleavage.

like 69 but second base

It is when you apologize for committing 49 in the definition where you say something gay to your friends.