511
511 definition by Slang.net
This page explains what the slang term "511" means. The definition, example, and related terms listed above have been written and compiled by the Slang.net team.
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Some people use 511 as shorthand for "too much information." This slang term is a play on 411, a common synonym for "information." If 411 represents just the right amount of information, the thinking goes, 511 represents far too much.
More commonly, however, people abbreviate "too much information" to TMI. Therefore, if someone you know used 511 to mean "too much information," you may want to tell them to start using TMI instead.