1 definition by Mary Killian

Top Definition
1. Refers to the texture and density of a man’s penis at maximum stimulation;
2. requiring great physical or mental effort to accomplish or comprehend or endure;
1. "When she slid off her pink thong, my cock got superhard"

2. I studied all night long, and the test was still superhard"
by Mary Killian November 21, 2006

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