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Many men envy this elusive type of chub (erection). While attaining a 1/2 or even 3/4 chub is a well respected achievement, the Harry Potter Chub is a holy grail in the eyes of a man. The reference to Harry Potter is a nod to the Platform 9 and 3/4 as initially seen in the book. Such an erection, thus, goes beyond the normal realm of chubs. When a man surpasses the half chub with ease, a Harry Potter Chub is likely to arouse, while mysteriously skipping past all numbers in between. To attain such a desirable chub, a man is usually subject to seeing an extremely attractive woman and/or objects such as HBT, jeeps, beer, colorado, sandwiches etc. This certain chub can cause pants to tighten and young children to scream. Use caution. Also known as the HP chub or the Ron Jeremy Chub (RJ chub), who subsequently has a 9 and 3/4 inch penis at full girth. It's not a coincidence.
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