Hijacker

[Dianne]

A Hijacker could be defined as one who masturbates [on a plane]. This could also be considered as [sneaking] into [the mile high club].

[Merna]

A person who illegally seizes an aircraft, ship, or vehicle while in transit and forces it to go to a different destination or uses it for their own purposes.

[Sommer]

noun.
An alternate name for a [boxcutter] or a similar knife-like tool as used by stock persons, shipping [clerks], box packers, etc.
origin:
Related to the Sept. 11th destruction of [the World Trade Center] by airplanes. The boxcutter was the weapon of choice used by the terrorists that hijacked the airplanes.

[Renato]

One who gets high [--] usually with [marijuana] -- and proceeds [to jack] off.

[Sarah]

someone who takes control of an aircraft or other vehicle during a journey by force: