Spontaneously Aspirate

To spew, blow chunks, barf, do the technicolor yawn, or simply vomit unexpectedly

"what's that smell?"
"dude, Mikey spontaneously aspirated in my backseat while we were coming home from the party last night. It took me four rolls of paper towel, two bottles of Nil-Odour, and three of those little green tree air freshers to make it even bearable in here"