When the owner of male genitalia enters their parter while being completely hard, using their appendage as the only body part to which they prop their body upward in an open armed and legged position presenting that of a bird in flight - typically facing in opposite directions, thus the “reverse” description. The position was inspired by the old 90s toy of a plastic bird figure that balanced gracefully on the tip of a finger appearing to be in flight.
Luke preformed a reverse thunderbird on Phil after an exceptional band practice that left both aroused and ready to fly.
Thunderbird is a mythical creature was depicted as An Eagle with Ability of lightning manipulation and possibly an alien creature from outer space
An thunderbird clapping with the wings create a thunderstorm
A woman that as overdone the fillers and botox and now looks like a Thunderbird puppet
See her over there, she's a Thunderbird puppet trapped in a woman's body
A girl with old-fashion tastes that entertains multiple people at once.
Guy 1: "Hey did you see that guy Tiffany is with now?"
Guy 2: "Which one? You know she's a Thunderbird lol"