this phrase simply put means that the object of the abuse is quite mad in the head. therefor should instead of fucking off "GO AND THROW SHITE AT THE MOON"
insane man - moo boo hoo too coo
sane man - christ on a bike that mad in the head person is dribbling shit again i so wish he would fuck off and go and throw shite at the moon
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)