Definition of party-crashing in US English:

party-crashing

noun

North American
informal
  • The action of attending a party or other gathering without an invitation.

adjective

North American
informal
  • Of a person: that attends a party or other gathering without an invitation; that gate-crashes.

Origin

1930s; earliest use found in Ogden (Utah) Standard Examiner. From party + crashing<br>1940s; earliest use found in The Chicago Tribune. From party + crashing.

Pronunciation

party-crashing

/ˈpɑːtɪˌkraʃɪŋ/