Robyn is a friend of Carly Shay and Sam Puckett. She is never seen on the show, but is mentioned by Sam. Robyn does have a weiner dog for a pet, as seen in iWill Date Freddie. Her weiner dog was featured in an iCarly segment, Animals Dressed Like Other Animals, where he was dressed like a pig. Sam states, "This is for you, Robyn. (applause)".
The term "Robyn's Weiner" is an ongoing reference to iCarly producer Robin Weiner, who has collaborated with Dan Schneider on many of his shows.