ship
A slang term that came about within the past five to 10 years and has been used fairly recently, though I haven't heard it used a lot of late, not that I'm really wired into that anymore now that my youngest has gone off to college and I no longer have a house full of teenagers, is "ship," which is short for "relationship," for example, one might say:
"They walked in the restaurant and saw a few other ships around
their age."
"Ship" is simply an abbreviation of "relationship," in the sense of romantic relationship or couple, though, as it pertains to youth, I wouldn't go so far as to say it necessarily includes only couples, slang and labels used by youth tending towards more open-ended definitions, so, for example, one would not expect a throuple to be excluded from being called a ship, but I digress.
It is from the slang noun "ship" that the slang verb "ship" then evolved, so when someone tries to get two people to romantically couple, wishes they would, fantasizes they would, or really wishes them to continue after they already have, one may say something like, "I ship Ben and Jennifer."
Coinciding with the advent of the slang term "ship" was the start of the practice of forming a portmanteau out of the names of the members of a ship (e.g., calling the couple or ship in the above paragraph's example "Bennifer" by combining their names "Ben" and "Jennifer"), so we began to hear things like, "I ship Bennifer" (i.e., "I ship Ben and Jennifer."). That coincidence resulted in an alternate definition of "ship," a verb meaning to create a single, collective name for a couple by combining their individual names, but that definition is one used only by older people as it came from younger people saying things like, "I ship Bennifer," and older people misinterpreting them as saying that they're dubbing them "Bennifer" rather than assuming that name to be understood and actually saying that they wish them to be in relationship. So, while so naming a couple is now a slang definition of "ship," it's slang that only older people use, one that when younger people hear, they roll their eyes at, a mockery of older people appropriating and then misusing their slang.
Anyway, slang comes and goes in the zeitgeist at the speed of sound, so my caveat to you and others reading answers to this question is that any answer to this question, aside from being prone to being unfounded and/or opinion-based as the scant sources providing recent slang (i.e., what kids these days are saying) and definitions are notoriously unreliable (e.g., Urban Dictionary), is that answers will tend to be fleeting, nonpermanent, quite possibly no longer true within a short timespan, so while this answer may be true in 2021, it may not be true five or 10 years from now, which is important as there are many answers on this site that are that old and those answers come up in Google searches and searches on this site and those answers are often used by users in reference to other questions, like to close one for being a duplicate.