Jubilee line is a song by Wilbur Soot (Your city gave me asthma 2020 full album) which refers to the suicide attempts in London.
X: Hey dude! Are you okay?

Y:Hey, im gonna jubilee line myself.
by wibluir_suit December 10, 2021
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A line refers to the adjective, strait, so I'm not a line, would mean I'm not strait. Basically a secret way of saying your gay. Used mostly by people in the closet that aren't in a very good situation. But can also be used as a joke amongst outed LGBTQ+ members.
*Enters room with Mom*
Me: Hey mom..
Mom: Yes sweetie

Me: You are, but im not a line.
Mom: I don't understand. What does that mean
Me: Hopefully your able to understand one day but not today
*Exit the room away from confused mom*
by Cassiopeia83 December 26, 2016
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