Top Definition
A craving/longing to become sexually active with a cactus. Putting a cactus inside and around your genitalia, and getting pleasure from it.
Bob "man that cactus is just turning me on i want to shove it up my anus"

Emma "Hey when yor finished with your cactus can i have it i think im cactosexual and i want to experiment"
by Mariposia May 13, 2011
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