We found one dictionary that defines the word hemipeen:

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1. hemipeen: Wiktionary

Definitions from Wiktionary (hemipeen) ▸ noun:  (informal) Synonym of hemipenis ▸ Words similar to hemipeen ▸ Usage examples for hemipeen ▸ Idioms related to hemipeen ▸ Wikipedia articles (New!) ▸ Popular adjectives describing hemipeen ▸ Words that often appear near hemipeen ▸ Rhymes of hemipeen ▸ Invented words related to hemipeen