snot-freezing index Share definition Flag The temperature at which the snot in your nose freezes. Any temperature above this is not considered cold. Man, its so fucking cold out, I think we reached the snot-freezing index. snot-freezing index by TBob April 19, 2008 0 0 Get merch Get the snot-freezing index mug. Buy Now — $32.95 See more merch