Dear lkwdbubby,
Please note that the “tuna beigel” term means different things to different people. You may not want to use the term when speaking with a Shadchan or when inquiring among your friends for a Shadchan, as you might give over a completely erroneous impression of the girl in question.
For your own sake, please realize that not everyone thinks of tuna beigel “as a Chasidishe bochur who learnt in Mir or a Yeshiva like that, in other words, it is a basically good Chasidishe bochur who has been in the Yeshivishe world”.
It is used to refer to multiple types, and you are best off describing what you are interested in without relying on labels.
Hatzlacha