1. To leave in a hurry.
2. To drop the control rods into a reactor core. Originally coming from the acronym Super-Critical Reactor Axe Man coined during the original testing of reactor design using graphic bricks as a moderator. In the event of a highly supercritical reaction, the axe man would cut the ropes causing the rods to be fully inserted and supress the neutron flux and thereby drastically reduce the fission rate and rate of heat production.
3. (slang) To turn something off. Derived from the above and used primarily by nuclear engineering majors or nuclear operators in the Navy.
1. Po-po's man, let's scram.
2. The reactor scrammed on an automatic protective feature.
3. My computer started smoking so I scrammed it.
by nuke_eo August 1, 2005
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1) Someone who is a loser
2) Someone who doesn't follow/listen to anyone
3) Some one who doesn't really have any friends
P1: Wow "chicken nuggets" is such a scram
P2: So true.
by YouLiveandLearn December 21, 2009
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Acronym for Safety Control Rod Axe Man. In very early nuclear reactors, the control rod assembly was suspended above the reactor core with a cable. In the event of the reactor starting to go out of control, the axe man would cut the cable to drop the control rod assembly into the core almost instantaneously stopping the reaction. However, everyone else would run out of the building. Hence, the word SCRAM got it's current meaning i.e. to make a hastened exit (used either as a verb or an imperitive).

Please note that modern safety technology has made a nuclear reactor the safest place to work (safer than a bank, in fact), and the axe man position is no longer used.
1. The reactor's starting to go super-critical! OK, SCRAM!!!

2. We'd better scram before the game traffic lets out...

3. Ok punk, now scram!
by Pro-Nuke April 1, 2009
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Going out drinking when everyone else is cramming for an exam or having to work the next day.
That guy was scramming till 6am.
by turbo911 July 1, 2011
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Nosh. Food on the go. Quick meal. Fast food.
I’m going to grab a scarf and scram. Want some?

Wow look at her scarf and scram.
by Burkey Turkey March 25, 2019
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A bi-early event where a pack of four dragons or more undergo scraming. This most notably refers to the Great Dragon Scram of 1577 in the HBO show Game of Thrones.
Keem: Yo, Hassan, are you coming to watch the dragon scram this year?
Hassan: No, I should KMS I guess.
by LiteralLemon June 15, 2016
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