Abhorrent pelvic gyrations performed by human males causing their flacid penis to flail about in a most uncomplementary manner; typically performed in the presence of a human female in a misguided attempt to impress her during the mating ritual.
Mary had considered "going all the way" with Bob until she witnessed the horror of him performing the Helicopter Dick, at which point she suddenly lost any and all sexual desire.
A dance invented by Adam Morehouse, aka "Novawar" from the popular youtube channel LifesAGlitchTV. Usually preformed sitting in a desk chair, and always preformed to dubstep, most commonly the song "Bangarang" by Skrillex, it involves pumping your fists up into the air, as well as backstroking repeatedly. The dance is a reference to a time LAGTV went to a dubstep club and witness a man pull out his penis and proceed to flail it around to the beat of the dubstep. According to Adam, the dance can solve all of your relationship problems.
Dick helicoptering - The act of swinging one's phallus in a circular motion with such velocity than positive lift is achieved. Generally used in the context of literal or metaphorical phallus size comparisons, as the ease at which lift is achieved is directly proportional to the size and/or aerodynamic suitability of said member.
Josh was such a douche, he is always dick helicoptering about how great he did.