Two middle fingers given at once.

Flipping somebody off with both of your middle fingers.

When having intercourse with a female, doggie style, the male flaps his arms, caws vigorously in a bird-like fashion, proceeds to break hand flap and deliver single hand strike to right buttock, followed by equivocal strike to left buttock. Upon completion, male disengages, announcing "DOUBLE BIRD STRIKE!" Shortly thereafter, male climaxes upon the female's posterior, exclaiming "SPLASH DOWN."

Aviation term for when a bird flies into two engines of a jet plane, or else, when two birds fly into one engine.

Starting with 2 fists palms down, extend both middle fingers and rotate both fists inward until palms are facing upward. End with a snappy, short, punching motion. Usually performed best after having slammed your bedroom door in your parents’ faces.

Common:
The act of giving somone "the finger" by extending your middle and ring finger of either/both hands in rage. Gives the appearance that you have two middle fingers on the same hand.

Alternate:
Extending the middle finger on each hand as to give someone the finger with both hands.

Often called Flipping the Nixon (telated to Nixon flipping the peace sign overseas which is the same as flipping someone off, also because the formation almost appears to look like your flipping a peace sign).

When a man ejaculates inside of a women without warning. He then sucks the jizz out of her, and drops it into her mouth.

Often abbreviate as DDMB