no-show

Short definition from Wiktionary

Noun

1. 1
   An absence; failure to show up or to make a scheduled appearance, especially at a hotel or a place of employment.
2. 2
   A person or group that does not show up.
3. 3
   Ellipsis of no-show sock.
4. 4
   Alternative form of no-show.

Verb

1. 1
   To fail to show up for something.