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Signal passed at danger (SPAD), in British railway terminology, describes an event where a train has run beyond its allocated signal block without authority, as indicated by a lineside signal showing danger (typically a red light). It is a term primarily used within the British Railway Industry, although it can be applied worldwide.
There have been three SPADs on the District Line in the past year.
by enjayhch August 29, 2009
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Acronym of Signal Passed At Danger: when the choo-choo train enters the tunnel of love whilst ignoring the red warning signs at the entrance.

See also red rooter.
"Well, I 'ad vis bird round ve back of KFC up against ve bins, and she was well up fer it, so in I goes, gave her wat for, got 'ome, took a slash & realised I'd SPAD-ded, ve dirty bitch!"
by Stoatman August 21, 2004
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Abbreviation for sports administration at Laurentian University. Considered the Brads and Chads of Laurentian. These students can be found in packs with two-fours of Coronas because its always rona season and can be seen ripping up Sudbury on Canadian Party Life. Many other students at laurentian refer to these student "SPAD boys, bad boys" or "SPAD girl, bad girl". Contrary to popular belief, these students likely work harder than most students at Laurentian University. Students can be spotted sporting a "Spadurdays are for the boys" flag
Meagan: Crystal, why have I done all the SPAD boys?
Crystal: They're SPAD boy bad boys, it's just how it is.

"Are you going to watch the NHL draft tonight?"
"Are you kidding? As a SPAD student, isn't it mandatory to watch?"
by Spad Gal 2021 July 08, 2018
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When you shit and piss at some ones home and then ditch them. SHIT PISS AND DITCH
by Seanathon Bon July 16, 2009
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n. poerson who fails miserably, after the type of r/c airplane commonly known to crash and stick up like a fencepost in the ground
"He failed the test again. What a spad."
by Lunarose October 21, 2003
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A 'sports dad'. The kind that yells at his own kids at sporting events to do better, run faster, etc. Or worse, yells at his kids' teammates or the kids on the opposing team. The male version of a spom.
I wish that spad in the front row would shut-up so I could enjoy the game!
by patriot1872 December 07, 2007
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