Its a pseudo name derived for the word 4D (as in fourth dimension) which was coined in 2005 and was later used by the a tech company, Fourdy Group.
(it's a noun)
When one puts a dildo on each of his/her four fingers and proceeds to slap another across the face with the dildoed hand. Preferably preceded by a killer setup, see below.
Dude1 has his hand hidden behind his back with a dildo on each of his four fingers.
Dude 1, “You’ve got a fourdick on your face.”
Dude 2, “I think you messed up that joke man. Isn’t it supposed to be a dickfor?”
Dude 1, “Who said anything about a joke? I’m just telling you you’ve got a fourdick on your face.”
Dude 2, “Fine, I’ll bite. What’s a fourdick?”
Dude 1 slaps Dude 2 across the face with his dildoed hand.
Fourty Clocks is when fourty clocks get together and form a grandfather clock which attacks the atmospherical existence of turtles using multiple smurfs.
Wait...was that a smurf? Oh god we need to go, the fourty clocks are coming to get the atmospherical existence of the turtles, hunny! Get the turtles into the log cabin!
Group sex with fourpeople. A combination of the words "four" and "orgy."
Rob: "Did you have the sex last night with your girlfriend?"
Westley: "Dude, my girlfriend and I hooked up with another couple. We totally had a fourgy!"