The sound, action and experience of salad dressing--or other such fluids--blurching forth from its container, when squeezed.
The salad dressing blurched forth from the bottle all over my plate.
A belch that brings a small amount of stomach acid into the throat, stopping just short of becoming vomit.
"I can't eat Taco Bell food; it makes me blurch."
When a hiccup, sneeze, cough, or laugh causes food or drink to emit from one's nose.
I was finishing my applesauce when that dog fell down and I blurched it all down my shirt. Also - Don't blurch, Coke burns the nose.