Is there any language that has a lateral consonant where air is allowed to pass by only one side of the tongue instead of both? This would be for example "l" but with the tongue moved to the left or right until it completely blocks one side. Is there an IPA symbol for this?
"Sidedness" in laterals is not a linguistically distinctive property, so one could be right-lateral, left-lateral or bilateral, though behavior is speaker-governed. There may be a tendency for people to have the opening on the right: I don't know of any studies of sidedness of laterals correlating with handedness (I have suspicions), or even systematic articulatory studies of any kind of lateral.