Common typo for the aim slang word lol. When you see this used, you can pretty much discern that the writer is a complete fucking moron.

What started off as a simple ebay auction, became a fabled internet scam of a known scammer. The scammer tried to use a fake escrow service in order to rip a apple powerbook off a legitimate seller on eBay. Knowing what was really going on, the seller hatched a hilarious plot that took advantage of the scammer. The seller ended up enclosing a pieced together "P-P-P-Powerbook" which consisted of a 3-ring binder with old keyboard keys glued to it. On the sides and back; fire wire, monitor!, and various other ports were drawn on with a black marker. Also included in the package were pencil shavings and misburned cdrs. The seller reported a 2000 dollar value for the package, so the scammer had to pay the full 27% tax in order to receive his parcel. Eventually the scammer did pay this tax and received his package only to find out "it is broken". During the whole event, members from the message boards the prank originated from staked out the address the package was being delivered to. The address was for a barbershop with an internet cafe above. One of the "undercover agents" even had his hair cut there while he was doing reconnaissance. Simply searching for “P-P-P-Powerbook” on any search engine will yield more detailed results.

/p is a tone indicator which means 'platonic'. it's used in text to show that whatever you're saying, is completely platonic, unlike its counterpart /r

The P is a mythical celtic warrior and warlock. He abuses steroids and shags women without a condom. He relies on the withdrawal method, often found drinking Ale in a tavern while arm wrestling yoong lads who think they're big. When he's finished he slams skank pussy in the tavern Jack's. Injects steroids into his cock and refers to himself in third person while telling tales of past glories.

the YUM! emoticon. its not used frequently, but its definitly worth using in some situations.

A kiss with tongue
A.K.A a French Kiss

It's a emoticon with a tongue sticking out.