A classic law school student -ism. Usually employed right before the speaker dives into an argument that has no sound basis in logic, reason, or this universe.

When someone attempts to say, "Yeah, but (...)" etc, it will sound as though the two words are often combined into one, as if it were a small woodland animal. Hence, you obtain "Yeahbut". It is even more so funny when they say "fucking" afterwards, making it sound as though they plan on having intercourse with a small woodland animal.