"5 by" is short for "5 by 5". This is a measure on the scale of 1 to 5 of loudness and clarity of voice transmission. "5 by 5" means "loud and clear".
"I read you 5 by."
by Chrys in Houston March 13, 2004

someone says they like your shirt over texting and you text back a casual <5 ( i think your swell for saying that)
by isaacthegreatest November 21, 2011

"The Five" is a reference to the American city of New York City. Modern day New York City was formed by the amalgamation of the five boroughs of Manhattan, The Bronx, Queens, Brooklyn, and Staten Island formed in 1898.
by CoolStoryMat May 21, 2016

by Jordandijinz0rz October 30, 2004

by istoleyourboat August 13, 2011

Given as a sign of full approval. Derived from the voting system on Threadless, it's become a show of love for a remark, design, person, etc. Primary use is in the Community Forum, but could extend to the "real" world.
Blog entry: Here's a picture of me with my new mohawk! I may end up losing my job.. but doesn't it look awesome!?!
Comment: $5.
Comment: $5.
by Rock Deputy July 29, 2008

Refering to Highway 5 that stretches from the California/Mexican border in San Diego, all the way up to Canada.
by all4padres June 29, 2008
