A sneaky link is a secret hookup or romantic meetup kept hidden from friends and others.
Sneaky link refers to a hidden romantic or sexual rendezvous, and sometimes to the secret partner involved. The whole point is that the meetup stays private and off everyone else’s radar.
It might mean seeing someone discreetly without telling your friends, meeting late at night, or quietly spending time with a person you would rather not be seen with in public. The arrangement is usually casual and unannounced.
The term spread through social media and music, and it can be lighthearted between two consenting people who simply want privacy for their own reasons. It overlaps with keeping a relationship low-key, though secrecy can also signal that someone is hiding the connection for less honest reasons.
If you are someone’s sneaky link, it helps to understand why. Privacy by mutual choice is fine; being hidden because you are a backup or a secret is a different and worse situation.