Originated July 21, 2018, when BTS member V posted on
WEIBO:
"η΄«η±δ½ π" which directly translates to
"I
purple love you" or simply "
I purple you" from Mandarin. The phrase orginally comes as "εͺζδ½ " which means "I only love you", but V replaced εͺ (only) with the similarlly sounding η΄« (purple).
The wordplay is seen to be adamantly remarkable, considering even many chinese-speaking fans did not notice the pun at first, and V is a non-native speaker in English and Mandarin, both languages which of are necessary to make/understand this pun.
Because of this, the phrase "
I Purple You" has now been popularized and is even used outside of BTS and their fans.
V further defines Purple to be the color of trust and long-lasting love, because Purple comes last
in the rainbow, following all other colors.
In short, "I Purple You" is slang for "I trust you", "I love you" and "I will stay by your side".