Top Definition
Noun, nuclear physics. A fuel rod is a tube packed with pellets of a fissionable material such as Uranium 235. Many rods are placed in a nuclear reactor where they undergo fission, releasing huge amounts of energy.

Noun, anatomical. A male penis. Placed in a vagina it is capable of releasing huge quantities of spermatozoa which look like little fish.
Dude 1: "Man last night was amazing!"
Dude 2: "How so?"
Dude 1: "My chick's reactor was hot so I stuck in my fuel rod, emptied it and she had a frickin' melt down like Three Mile Island!"
by Wizards Sleeve December 27, 2005
6 Words related to fuel rod

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