That horrible oil that gathers around the edge of a dinner plate whilst eating badly-cooked or cheap canteen food. Unnaturally red or yellow in colour and about as good for your health as a heart attack.
"Hey chef! What's all this sluce doing here?"
by Mr Ben February 07, 2005
To rest one's penis on an unexpecting person's shoulder. Without the second participant knowing.
Look Dave is sluceing the passed out guy at the bar.
by SirHenry October 22, 2015