Some people are lucky and have long, full biceps which when flexed run right from the bend in the elbow. Others (and unfortunately, I’m one of them) have short biceps with a sizeable gap between the biceps and the bend in the elbow.
Call them what you want, short biceps, midget biceps… (just not within earshot of me or I’ll punch you!)… generally… people with them would like to make them longer.
It’s a fairly common issue, and I’ve seen a lot of articles and forum posts regarding how to fix this ‘problem’. Some people recommend hammer curls which they claim will help to make the biceps longer. Reverse curls are also recommended.
The truth is, you can’t make your biceps longer… because that would require you to make your connective tendons shorter and you can’t do that without scissors, strong stitching material and copious amounts of idiocy…
You can, however, maybe do one or two things to minimize the effect and create an illusion of longer biceps. Forearm workouts and exercises which stress the lower biceps and tendon area more will also help some. See an article I found written by the legendary bodybuilder Larry Scott on training the lower biceps.