1 definition by Invasive Protusion

An underwhelming male orgasm. If ejaculate is present, it dribbles feebly and apologetically out.
Did you just jizz your pants? Yes, but it was only a Melvin.
After wank number 5 that day, he realised was no longer enjoying himself, as his overworked phallus begrudgingly performed a Melvin.
by Invasive Protusion May 13, 2016
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