on it like vomit

An expression indicating a tenacious will to execute a task regardless of difficulty.
Refers to the inability to cleanse the odor of vomit from clothing, or more specifically, automobile upholstery.

Because of the quick question, the popular is, you feel better after vomiting, Aha, no, the birthday cake made you vomit, but how can vomiting make you feel better like you, is a research to Kelly Crosse, after vomiting, butter will make you feel better after you vomit, a great catholic to you.