P= peace
L= love
U= unity
R= respect
it started up in the rave scene/culture. dj frankie bones was believed to have started PLUR after a fight started while his was deejayin. he said "If you don't start showing some peace, love, and unity, I'll break your fucking faces." then respect was added to it in a discussion in a rave newsgroup(alt.music.rave)
its also mainly used on rave sites and stuff like gs.c(
glowsticking.com)
cauz u wouldnt say PLUR in real life but u would
say peace love unity and respect.
it is also sometihng that ppl/ravers live by. it has a good meaning that should be used everywhere i reckon