shimaidon is genre in which someone is able to get their way with two sisters. Futago means literally twins, Shimadidon futago it's Shimaidon with exclusive twins
Verb: To sloppily pleasure a woman's genitalia while dancing in a public area. Usually executed by severely intoxicated men and women with impaired judgement.
Noun: The act of shigooning
Present: Justin is shigooning that girl.
Past: He shigooned her - and she liked it.
Future: He is so going to shigoon her.