LHP is the short form of Little Happy Peach which refers to a white girl with lavender hair. LHP2 is the less popular form of LHP referring to Little Happy Peeled Peach.
Left hand path is in the western esoteric tradition believed to be the evil path, equating black magic. It's opposite is the right hand path, which stands for white magic.
The shortcut can be found in Danzig's 2010 album "Deth Red Sabaoth"
LHP is the roadI'm on, if you'd like you can come along
just make sure that it's what you want, and your will is strong