crasher

Noun

 * 1) One who crashes.
 * 2) One who attends an event without an invitation.
 * Wedding Crashers (2005 movie)
 * Wedding Crashers (2005 movie)

Etymology
From.

Verb

 * 1)  to crash-land
 * 2)  to crash
 * 3)  to crash
 * 4)  to crash