What do you call it when someone swipes their badge/ID to gain access to a secure area (e.g. Front Door at Work) and someone else slips in behind them??
There is a name for that, and for the life of me, I can’t remember what it is called.
I want to say “Door Surfing” but that isn’t it. :-/
In the US, tailgating also often refers to having a picnic/party out of the rear of your vehicle in a parking lot before attending a sports event.
In answer to Debbie’s question though, it is a word for when someone “slips” in behind. Piggybacking is when an unauthorized person follows an authorized person inside with the latter’s consent.