Or for the British out there a full stop. Or from the linked page:
"A nonsense mutation is a point mutation that introduces a premature stop codon into the part of the gene that encodes a protein. A stop codon is like a period at the end of a sentence: it instructs the ribosome to stop making the protein. So if a mutation leads to an early stop codon, only part of the protein will be made. 'Half-baked' proteins that result from nonsense mutations are often nonfunctional or defective."
Feel free to be the first
Please review the linked page for context.
If you can think of something better than this,
please add it to the database