Possibly a blend of vomit and atrocious.
vomitrocious (comparative more vomitrocious, superlative most vomitrocious)
- (slang) Causing a desire to vomit; disgusting or gross.
- 1997, Jamie Suzanne, Big Brother's in Love Again, Random House (1997), ISBN 9780553484359, page 11:
- Her mother always embarrassed her to death. She'd linger by the Pepto-Bismol display, or she'd buy tons of cans of something vomitrocious like corned beef hash.