The popular opening phrase used in texts by socially awkward guys to seem vaguely casual and interesting without being excessively needy and extra; there is also the clever use of an emoji to convey a playful boyish spirit. It is important to note that this only seems cool to them and not the intended recipient of the text
Normal People:

N: Hey, how's it going?
M: Not much
N(internally): I'm going to die alone and unloved

Socially Awkward

N: Hi, anybody there :P ?
M: Not much
N (internally): I am a cool, funny and valid human being
by Parasitical Pineapple October 23, 2017
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A reaction mechanism that removes the hydroxide group on pseudoephedrine yielding crystal meth. The reaction involves red phosphorus(P), hydroiodic acid(HI), and pseudoephedrine.

Was the method used in (at least the first couple seasons) of breaking bad, and is both safer than, and relatively clean compared to the shake-and-bake technique.
Sketchy nerd : “the HI/P is the one we should prioritize...”

Snitch: “holy shit, that nerd is sketchy. I’d better snitch”
by the official coprapheliac April 28, 2019
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