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1. third rail
A dangerous area of discussion, a point at which the mere mention of a subject result is disaster. Commonly used in politics.
"Social security is the third rail of politics. Step on it and you're dead."
-The West Wing
2. third rail
An additional rail usually found in subway systems, running parallel to the existing tracks, and sometimes slightly elevated. The third rail carries a live electric current which is used to power the subway trains.
"No Trespassing - DANGER THIRD RAIL"
by Mr. X-106 Aug 29, 2004 add a video
3. third rail
an expression of rage or frustration; a desire to see something destroyed (as in electrocuted on the third rail on a rail track)
"God, this guy is really pissing me off... I'm about to go third rail on this asshole."
by minch Feb 28, 2003 add a video
4. third rail
a great break up line
go touch the third rail
5. THIRD RAIL
The term THIRD RAIL commonly is a low pro way of refferancing one's Cock, mostly used when talking directly to or within ear shot of some bitches. Can be used to insult, make fun of with out them really catching on, or as a little bit of "verbal bling" while telling a story.
"sup, you ladies down with the trird rail or what?"

"third rail clothing co."
6. third rail
1. Expression: a distinctive way of communicating your dissatisfaction with the situation. Draw out "third", emphasis on "rail"
That dumb fuckin bitch at Food Lion took twenty minutes to run a price check on my shrimp flavored Ramen. Thiiiiiiirrrrrd RAIL!!!!!!!!!!
by DBo Feb 28, 2003 add a video
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