It's when you have a late night conversation (usually while on the phone), while very sleepy. The next morning, you forget what you were talking about towards the end of the conversation.
Guy 1: Remember what we talked about last night?
Guy 2: Uhh... No, I think I have sleepnesia...
When you intend to take a short nap before going to your hawt girlfriends house to hang out with her and her cats after work, but you forget to set an alarm and end up waking up around 10pm. Then you just go back to bed until the morning
was gonna come over, but gothit with a sleepnap! sorry :(
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. Penguin Books,1992. p. 38)