Street jive for "gusto."

lil mad is like big mad but the opposite, you mad but not mad to the extent of pullin somthin

When you are about to give someone a high five, right before the hands touch, you turn the wrist of the raised arm 90 degrees, mimicking an air vent opening up. This causes the recipient of the prank to miss the high five and stumble forward under his own momentum as you walk away proud.

For the two handed high five, the double air vent typically results in a hug.

when a small cold breeze floats up between the ass cheeks and into ones anal cavity