The act of watching a movie with someone other than one's spouse or significant other, esp. after agreeing to watch that movie together.
Going to see Slumdog Millionaire with his coworkers last night after he promised we'd see it together was an act of cinemadultery! He's so in the doghouse!
A word referring to either a character from 50 ways to die in Minecraft or a phrase that when searched on YouTube will find you pornographic playlists.
"Do NOT search for "Cinemadversary" on YouTube's search bar! Some gross stuff will show up if you do because about 20 different users included my video in their playlists and the first video in all of these playlists have some really explicit thumbnails for some reason," Said Jake