What is Thunderslam?
1.
When about to have sexual intercourse, rather than easing the penis into the vagina, you yell the word "thunderslam" and you slam your penis home hard and dry.
Dude did you hear it last night, I heard David yell thunderslam and a few minutes later I saw Shanaynay walk out pissed and hurting.
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1.
Usually occurs sometime in your twenties, a few years out of school and still feel as though you're waiting for you're life to..