an image which is extremely fascinating or horrifying that you see or is envisioned from a verbal description which stays in your mind for a long time or permanently to be recalled later at an inoppurtune time.
Aagh! I just got a brain tattoo of that pot-bellied dude riding a bicycle in only a speedo, a bandana, socks and shoes. I did not need to see his vienna sausage and mini plums.
by J. Gowen May 15, 2009