verb. (to flandangle) Literally, the act of going commando in a flight suit, although more commonly used to describe any situation where a mans testicles bounce around freely, usually when freeballing.
Captain Rogers had a smirk on his face at the staff meeting yesterday, indicating that he was probably flandangling.
-or-
Joe ran track in his boxers, which resulted in some wicked flandangling.
1. v. It's like when your legs are above your head, during sex.
2. adj. Describes the worst beer pongshot possible.
3. n. The lovechild of a Flanigan and a Landis.
"Aw man, I totally missed that shot, it was such a Flandis!"
"When he screwed me, he totally put me into a Flandis."