A selfie... of the penis.
Usually used during a hardflirt, in hot videochat, in stalking, cyberstalking or a prank
"Look how's hot this chick, i'll send her a penfie "
"hey why so blue?; Oh shut up! ...my stalker sent a penfie] on my mom's phone!"
" honey im so horny... i miss you... pls send me a penfie "
TK Penality is the phrase "Team Killing Penalty" shortened down to get it out to other people faster. The "Team Killing Penalty" is a penalty given to a player when they kill their teammate in a game, whether it be accidental or on purpose.