dictionary writers, i.e. Noah Webster;founder, UrbanDictionary
Boy, those alphabet boys can sure write a good dictionary!
by MoJo Mojowitz August 29, 2005
Top Definition
a slang term for federal government law enforcement agencies such as the FBI, ATF, and IRS.
yo dog, i'm so smooth even those alphabet boys can't stop a nigga!
by vespa62GS July 20, 2005
A slang term meaning C.I.A, F.B.I, I.R.S, D.A, P.O, or C.O
Yo, ball out Squalie, dem alphabet boys is comin.
by Ballatition on a mission January 31, 2006
1. A male federal agent working for one of the common three-letter acronym (TLA) agencies, i.e. FBI, CIA, NSA or DHS.

2. A clean cut, usually white, male who looks like he may work for a government agency such as the FBI, CIA, NSA, or DHS.
Guy 1: "Did you see that alphabet boy take that bank robber down?"
Guy 2: "Daaamn"
by biff.loman April 20, 2006
The people who work for government agencies who spy on and/or lock up people when they catch them engaging in illegal activities.

Like the FBI, DEA, ATF, or CIA
"...them alphabet boys got us under surveillance."
- Young Jeezy "Soul Survivor"
by Chanelly Belly September 28, 2008
A boy (Or transgender boy) Who thinks he knows everything; tries to teach you how to live; claims he's always right when in general he's not as smart as he thinks he is.
I say fuck your degree alphabet boy, You think you're smarter than me with all your bad poetry. Hence Melanie Martinez's song : Alphabet Boy
by Scenetic Queen September 21, 2015
CIA, FBI, or other acronymed government agencies.
The alphabet boys are on my case becuase they think i'm the milk man.
by skootuh boi September 03, 2008
any goverment agency using letters to shorten the name of said agency i.e(FBI,CIA,DEA,ATF) origin comes from mostly drug dealers who use this phrase to tell their friends about something involving one of the law enforcement branches especialy if their house is bugged few officers of the law know what this means because this word is very rarely used around anyone outside of the criminal world
"man those alphabet boys been watching me all day"
"i almost sold to an alphabet boy today
by cee19 April 23, 2009
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