Usually important in the gay scene: a guy whose been banged without condums and is filled with cum....and then SPLAT, he "drops his mud"...and out comes all of the warm jizz on the floor!
One example is: "Yeh, I got so fucked last night that I thought my anal canal wouldn't take any moe, and then I just gave it all up, and dropped my MUD right there on the bedsheets"
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. PenguinBooks,1992. p. 38)