Subliminal stimuli (pronounced /sʌbˈlɪmɨnəl/, literally "below threshold"), contrary to supraliminal stimuli or "above threshold", are any sensory stimuli below an individual's absolute threshold for conscious perception. In human language this means that it is possible to hide secret messages on video (or audio) that appear to quickly for you to notice, but you still "feel" them unconsciously.
The whole idea behind the subliminal messages is really fascinating. It's amazing that many great songs might be hiding dark secrets which are just waiting to be uncovered. So I decided to share some great compilations of brainwashing music with subliminal messages that I've found on youtube.com.