Any process that stops, prevents, or reduces the frequency, rate or extent of natural killer T cell proliferation.
Synonyms:
exact_synonym:
down regulation of NK T cell proliferation; downregulation of NK T cell proliferation; negative regulation of NK T lymphocyte proliferation; negative regulation of NKT cell proliferation; negative regulation of NT cell proliferation; negative regulation of natural T cell proliferation; negative regulation of natural killer T cell proliferation