Noun. To arrive in your intended (or non-intended) destination without pre-arranged accommodation and to get drunk before arranging somewhere to stay. Normally results in camping in village squares or sleeping on the back seat of your car.
"We should probably find somewhere to stay tonight, it's already quite late."
"Nah, it'll be fine. Let's just pull a Mevagissey Special."
A movie described as on of the best movies ever made by a less than sophisticated friend. Upon watching said movie it is realized that the writing, acting and story is pure shit. Most Mahoney specials are usually overly macho, overly righteous and over stupid. Some examples include, Savages, 300, Law Abiding Citizen, Underworld and the ultimate Mahoney Special The Fast and the Furious.
Wow that movie last night sucked, it was a real Mahoney Special.