[ geyt-krash-er ]
/ ˈgeɪtˌkræʃ ər /
a person who attends or enters a social function without an invitation, a theater without a ticket, etc.
Origin of gate-crasher
An Americanism dating back to 1925–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019