A penis, usually found on an exotic male from another country in which you travel to, that is significantly larger than any penis you've had back home.
Usually a one time affair, vacation dick can satisfy a woman for her whole trip at the respective country she is traveling to.
Dick so large that any sex is extremely hot, yet very intense. Vacation dick can leave one incredibly exhausted from too much pleasure. Such sex is only good for one or two night stands on vacation.
"Hey Sarah, why did you stop seeing David? I thought you said the sex was incredible."
"Oh, it was! But you know... he had vacation dick and wanted to have sex every night. Shit got too intense for me! I need to get some boyfriend dick.