An idea or thought which is planted when one is sober, but refers to a time when you will be drunk. Normally a joke, if the seed grows with alcohol intake it will cause your drunken brain to remember it. This will result in you repeating the joke again and again throughout the night, on the basis that 'It was funny when I was sober, therefore must be funny now'
The idea of a 'beer jacket' was comical whilst sober, however as the sober seed sprouted, Dave had begun running around the party naked shouting 'I'm not cold, I have my beer jacket on'
by Raving Looney January 01, 2007