exists and is an alternate of. Merge this question into. Split and merge into it. Answer by Allie Scarlett. Confidence votes 5. A lump of butter is close to a tablespoon, but is simply a non-specific size or form. I hope this helps you out.xists and is an alternate of. Merge this question into. Split and merge into it. Answer by Allie Scarlett. Confidence votes 5. A lump of butter is close to a tablespoon, but is simply a non-specific size or form. I hope this helps you out.