There are those who say it isn't a chord until you have 3 notes. I'm going to skip the complex music theory behind the arguments (I haven't studied them enough to understand much less form an opinion).
Of course in most music contexts there is more than one instrument playing and so the others can fill in the missing note making a full chord. Only a "one-man-band" really feels the loss.
Every jazz player knows you can drop the fifth, and the root too if the bass is filling it in. That gives your fingers room to add even crazier extensions
If not, stop and watch it. But make a cup of tea to enjoy with it first, and maybe put a cloth over your keyboard for when you inevitably splutter tea all over it.
I think it's also ingrained that the chord starts from 3rd and 5th degrees so numbers above 7 are always adding in one of the other degrees. Or that a chord should have at most 'one of each'.
The argument was that this chord is unusual in that it's best thought of as having a second modified 3rd, rather than a #9 (raised 2nd)
The major-minor-7 chord is another example of the same degree twice... and we don't call that a maj-14 either
Of course in most music contexts there is more than one instrument playing and so the others can fill in the missing note making a full chord. Only a "one-man-band" really feels the loss.