Small rockets mounted on the sides of a rocket in many orientations; allows for fine maneuvering in space, especially useful for docking. Usually abbreviated RCS.
Let's shut down the main engine and complete the rendezvous with the reaction control system.
by Some weird nerd guy March 28, 2017
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The act of placing sperm in a microwave before injection into the uterus, in the hope that the child conceived may grow up to have super powers.
To this day, spermo-nuclear reaction has always ended in dead sperm, but maybe one day, a lucky mother will give birth to Superman.
by GI Jew the all American Hebrew November 11, 2016
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When 2 thirsty people think one another is attractive. Once meeting, there is an instant obligation to bone eachother. After about a week (can vary to a singular day) they will begin the reaction phase. Dating. The Double Thirsty Reaction does not apply if the couple lasts longer than 2 weeks.
fgt1: Tre and Briana have known eachother for a week. They've already gone on 4 movie dates dude.
fgt2: Oh no bro, it's the Double Thirsty Reaction
by djd1899 January 27, 2015
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n.

A theory that explains why the presence of a second male in a sexual scenario with a woman increases rather than decreases the arousal of a heterosexual male.

The presence of a second male causes the first male's testes to increase sperm and testosterone production. This evolutionary reaction occurs so that if they both engage in intercourse with her, his increased erection size and sperm count will boost his chances of inseminating her over his reproductive competition.

Although the reaction is most powerful in person when a second male's pheromones are present, just seeing another male's erect phallus through any type of media will trigger the reaction.

When the other male ejaculates, the first male's reaction surges, giving him an overwhelming urge to also ejaculate even if his penis is nowhere near a vagina or other orifice.
When I saw my wife's boyfriend emptying his balls inside her womb, my sperm competition reaction became too much and I dribbled my cream inside my pants.
by NeverGonnaGetIt69 July 16, 2021
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When an amount of things triggers a memory.

Good or Bad Memory
Friend - "This is so... Chemical Reaction Effect."

Me - Ikr.
by XDTheLonelyOreoDX January 21, 2018
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Delayed Reaction Man is one of the best superheros ever.

...However, he isn't that reliable for being on time to save the day.
Person One: *is about to be stabbed by a random stranger* Help me Delayed Reaction Man!

20 minutes later....

*Person One is left on the ground bleeidng in its own blood*
DRM: Have no fear! I'm here to save the day!
by Nion_lead June 11, 2008
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