The person(s) you meet when going to an event and standing in line for a long amount of time. Said people usually have shared interests, hold spots for bathroom breaks, get each other food/drink all while keeping their place in line.
Jeremy and Erik are Line-bros, they met while waiting in line for about 20 hours at the Blade show.
by MmAmOnKeY November 1, 2017
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A slang word for a tank top tan line.
"My bro line is so bad this year"
by matedate88 April 1, 2012
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