j-line 

In k-pop, it is referring to the Japanese members of the group.

Mina, Momo and Sana are part of the j-line in Twice.

j-line by wegetitnow December 27, 2021

j-line 

Direct line to Jesus

Did you get a J-Line at church tonight? Are you a J-Line to your friends and family?

j-line by JoyAdams November 15, 2006

J Line 

Please See J Train

"No Lines to fight, no ticket to price
I'm rollin' first class cause I've seen the light
Try as you may, but your money can't buy
A ticket on the J Line to the other side"

J Line by Josiah February 29, 2004