“Security was super tight.”

It's a busy travel season and there was recently a terrorism threat. Today you flew to a client's office on an airplane, and you're making small talk about the flight. You say:

Security was super tight.

security is tight

"Security" means guarding or protecting things. For example:

• "Airport security" is guarding an airport.
• "The Department of Homeland Security" is a government department in the U.S. which is in charge of protecting the country from terrorism.

When you describe security as "tight", it means that officers or security guards are watching something really carefully. When security is tight at an airport, it means that the security guards do extra checks like searching through people's bags and making them take their shoes off.

super (adjective)

"Super" means "very". You can use it in casual situations.