In a video game, to gather information on an area hidden in fog of war by charging in. To check for enemies with your face. Seems to have originated in League of Legends where vision-obscuring bushes allow champions to wait hidden from view in very close proximity to their opponents.
A Prairie Firecracker is when the women your are with is on her period. While having anal intercourse, you simultaneously pull out her tampon. The string of the tampon acts as the wick while the removal creates the bloody explosion.
Someone who becomes friends with a person, adds them on Facebook, then decides that the friendship can be maintained entirely on Facebook. They do not bother to organize to meet up with this person, sometimes they might not even acknowledge them when they walk past them in the street. Furthermore, they appear on Facebook to be great friends because they write on each others walls.
Person A:"I have 629 Facebook friends!"
Person B: "Wow, you must be getting constantly stopped in the street and chatted to."
Person A: "Meh, not really."
Person B: "You Faceslacker!"
Person C: "You're a cyberwhore. Haha, POKE!"