Caw-Caw

Started Jo Berry, "Caw-caw" is a loud call used in-store or online by members of Aldi Aisle of Shame (AOS) Facebook groups to find each other in Aldi grocery stores or to alert others to interesting items posted online. The exclamation can also let others shopping know you’ve found a great deal on something you’ve been looking for.
Crows make similar calls to find other birds, often repeating the sound several times and then waiting for a response. When an AOS member calls out "caw-caw" and another responds, the group members may greet each other with hugs, selfies, and excited conversation, and it has become a sensation among Aldi shoppers. It is unique among slang, involving the fact that it involves individuals in their 50’s-30’s.

“Caw-caw! I found a banger item over here, come check it out!”
“Caw-caw!”