Derail; a verb. Used to indicate the exact point of derailment, AKA EPDI (Exact Point of Derailment Indication) A topic is derailed when someone clearly goes off-topic with posts which are obviously not associated with the original topic subject, or goes about anally raping the topic tavles by posting huge-ass pictures.
by MeMB January 4, 2005

one who gets plowed like a piece of land; one who gets laid the fuck out, one who gets bombed by sharif
Holy shit dunne just got derailed and broke his wrist.
WOW, Pauly Tess just got derailed.
HOTDIGGITYDOG, Stup just got lined up and defuckinrailed.
Wilferd Brimley here, If you or someone you know has dyabeetus and got derailed call Liberty Medical now.
Maxx=derailed.
WOW, Pauly Tess just got derailed.
HOTDIGGITYDOG, Stup just got lined up and defuckinrailed.
Wilferd Brimley here, If you or someone you know has dyabeetus and got derailed call Liberty Medical now.
Maxx=derailed.
by Wilferd April 22, 2010

by FusionBolt2 May 4, 2011

This is when you mistakenly fallout of the vagina and literally smash the sphincter or asshole of a woman during sex.
I was having some intense sex with this chick, but I derailed and ruined everything. Especially her asshole.
by namgorf January 21, 2009

by Jim March 24, 2003

the act of sexual intercourse, usually referring to sex that is so hard it could knock a train off of the rail
Man, I derailed that chick so hard last night.
Would you care to join me for some derailing later tonight?
Would you care to join me for some derailing later tonight?
by Meeja July 19, 2017

E-mailing while inebriated.
by Folook December 27, 2007
