Can you absorb booze through the mucous membranes in your mouth without swallowing? Yes. According to the blog Science 20, "there are drugs bigger than ethanol molecules that are administered sublingually." But just because it's chemically valid doesn't make it an efficient method. You have to hold booze in your mouth, a little at a time, for a long time. If you were using a high-proof liquor, that would burn a lot. Definitely not worth it.
