A slackline is someone who is incompetent in slamming birds and is an absolute squid who goes by the name of usually toby
Zach: "Yo sam is acting like such a slackline right now, did you seem him at the darty yesterday?"
Bryan: "Yea he absolutely slammed zero birds"
Bryan: "Yea he absolutely slammed zero birds"
by saveitforthebest February 07, 2021