2
1. A term used by old folk to call being online.

2. A threat or warning
- "Woah man! Might wanna back up, you're on the line."

- "Come on, I dare you to step on the line."
by TenaciousWarlord May 17, 2016
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3
When a bro only texts a girl when he's lonely or needs attention. Usually he's inconsistent and keeps her on a rotation with other girls. Basically leading a girl on through text. No commitment.
"yeah, i'm not really looking for a relationship right now so I'm just keeping this girl on the line."
by TripleC October 27, 2014
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