When food is so good you know your going to eat embarrassing amounts of it.
Can be used in both the present and past tense.
Word is deprived of nom and shameful
That chocolate cake looks nomful
That pizza was nomful
The feeling when the ending for a programme of show reminds you of of how you felt when watching LOST for the first time, where at the end of every episode you would be all 'WTF just happened? Don't end there! Nooooooo'
I had a bad case of Lost Loneliness at the end of Catching Fire...
Did you see Captain America? I left the cinema full of Lost Loneliness!