So what if you sneeze and fart at the same time but the fart is juicy so basically you pooped your pants so you find it funny and start laughing. What do you call that?
That would be a Larty Snartblast.
Or a Sharty Lartblast
Or a Farty LartSnart
Or an OMGWTFPSGASMPWLAAS (oh my god what the f*** passed some gas and sh** my pants while laughing after a sneeze)