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. ;)
John: Dude, Stacy and I 48ed last night!
Steve: Nice, 48 leads to 69!