olemus
lubamatu füüsiline sisenemine reguleeritava pääsuga kohta, sissepääsuloaga isiku järel

Wiktionary:
tailgate, verb
2. to follow another person through access control on their access, rather than on one’s own credentials, especially when entering a door controlled by a card reader
Synonyms: piggyback, draft

https://en.wikipedia.org/wiki/Piggybacking_(security)

vt ka
- taganttrügimine