No, boofing a slow release stim would not make it not release slow. Boofing is a slang term for taking a drug orally, rather than snorting, smoking, or injecting it. Taking a slow release stim orally would still cause it to be released slowly, as the drug would still need to be broken down by the digestive system before it can be absorbed into the bloodstream.
The only way to make a slow release stim not release slowly would be to alter the formulation of the drug itself. This could involve changing the type of active ingredient, the amount of active ingredient, or the type of delivery system used. However, this would require a significant amount of research and development, and would likely be cost-prohibitive for most individuals.