A semi-cute nickname thrown in because the user is wanting to be sweet on someone, but at the same time be ambiguous about it. In such a way that the listener doesnt have time to respond.
Source (primary): Jerky Boys
The Belarussian phonetic equivalent for dolphin.
The sight of a pod of dolphins was unforgettable and figured prominently in the children's conversations ....The word they use for them is "jellyfin"