"a huge lump" is correct and usable in written English.
You can use it to refer to a large mass. For example: I felt a huge lump in my throat as I watched my best friend say goodbye.
While washing, she noticed a huge lump under her arm.
I tried to clear my throat but a huge lump remained.
Captain Sparks put a huge lump of chewing tobacco in his mouth and walked back into the sun.
If you have a pile of carbohydrate-heavy stodge, you will put out the fire straight away, like throwing a huge lump of coal on a barbecue.
"When the president states that he has no influence over the prosecutor's office," Mr. Rousso concluded, "we have to take that with a huge lump of salt".
When Mr. Hammer saw a huge lump of stone beneath the well-preserved ribs, he said he suspected that the chest cavity might still hold some internal organs.
The rest is pretty sugary, leading to a huge lump-in-the-throat final speech.
Some Republican strategists say that talking about a huge lump-sum tax cut gives Democrats the opportunity to attack it as a sop to the wealthy.
After walking around the huge lump a few times, running his hand over its surface textures and commenting approvingly, Koons clambered halfway up it, trying to remove one of the twenty-five separate, interlocking forms to show me how they fit together; he couldn't quite budge the section, so one of the Carlson employees brought over a ladder and got it out.
She showed me a huge cement lump painted a patchwork of vengefully strident colors that segued into lovely filmy golds and violets.
It took sewer workers three weeks to clear the huge lump, which was the size of a bus, with water jets.
