v. The act or result of penetrating a woman with such vigorous upward force that it causes her breasts to rotate rapidly, one clockwise, one counter-clockwise, as if helicopter blades on a Chinook helicopter. The act may be referenced both by the giver and/or the receiver, and is only applicable when employing the cowgirl or reverse cowgirl sexual position.
Dude! Last night I was Chinooking her so hard I thought she was going to fly away!
or
My tits hurt from all that Chinooking backstage at the Buck Cherry concert!
Partner to the act of "Soapy Helicopter".
Chinooking is TWO lathered up Penis' which are then... in a helicopter/rotating motion... Slapped upon the recipient's face.
Before she knew it, the lads were lathered up and handing out not 1, but 2 (Soapy) (Helicopters). She thought my 'o' my, what a (Chinooking)
When two gentlemen swirl their own tackle in unison whilst facing each other in order to emulate the double rotors of a chinook helicopter. During this act they are not allowed to touch.