A Transition Metal is an element from the D block of the periodic table which forms at least one ion with an incomplete d sub–shell containing at least one electron.

Used ambiguously by the WJEC to annoy students, especially Sam Jones.
Sam: 'Hey Alex, what's a transition metal?'

Alex: 'It's a D block element that forms ions with incomplete d orbitals.'

Sam 'Yeah, but the WJEC aren't really clear on their definition. It's causing a lot of confusion.'

Alex: 'That's exactly the type of shit those cunts would do!'
by GFawkes March 27, 2013
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Glasses that change from normal glasses to sunglasses according to the amount of light in their location. Mainly worn by autistic, karate-fighting kids. Often accompanied by a head-strap to keep the glasses on in physical circumstances (eg. karate, bullying episodes, etc). Also worn by douchebags that like to wear sunglasses in the winter.
Person 1: Hey, who's that kid hiding under his coat with the transitional glasses?
Person 2: Oh, that's Davey. Don't bother him or he'll hiss at you.
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The notion that, when a woman (or man, depending on how you swing) has given you a blow job, and then has kissed you at some point in the future, you have then, by transmission, had your dick in your mouth. This also applies to when it was someone else's dick being sucked, and then transferred to you in the act of kissing the one who had sucked dick.
A sucks B's dick, then A procedes to make out with B. therefore, B, through transitive property, had its own dick in his mouth.

A sucks B's dick, then later makes out with C. therefore, C has had B's dick in its mouth
by legatusmortis September 1, 2010
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To take public transit without paying the fair.
I'm too poor to buy my monthly pass yet. I'm going to be a transit bandit until pay day.

Sarena "Did you buy a skytrain ticket?"
Robert "No. I'm going to be a transit bandit on our way downtown tonight."
by Beatjunkie604 September 23, 2008
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a tan you gain while driving a transit van
when on the vinylresin.tk tour they gained a transit tan
by Vicky May 23, 2004
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Also simply called the "Transition", this is the time period between the 80s and 90s, from 1989 to 1991, possibly very early 1992. This corresponds with the administration of George Bush. The Cold War was over, but the 90s had not started yet since Bill Clinton was not yet in office. Cartoons of the time period were Teenage Mutant Ninja Turtles (along with their live-action movies) at the height of their popularity, the Nicktoons like Dough, Ren and Stimpy,and Rugrats, Captain Planet, and the latest Super Mario brothers cartoons to name a few. USA's cartoon express was still stubbornly hanging on though. This was also when music made a change from the 80s "hair bands" to the Seattle Sound and the grunge scene. Hip hop and rap were becoming more mainstream. The fashion was somewhat of a hybrid with 80s and 90s, neon colors remaining popular. This is also the same time that The Simpsonsfull length episodes premiered on the young FOX Network.
The Transition Era was awkward for all involved due to the drastic changes that occured. This has not occured before and so far not since.
by New English December 30, 2009
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A boyfriend that comes soon after a big break-up, who is more of a friend than a lover.
Josef was a "transitional joe" for Casey, after she broke up with Steven. It got her mind off of the bad times she was going through, her transition between being taken to being single.
by Dmitri1988 March 29, 2008
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