When the hairline of a person is so low that their forehead becomes reclassified a "threehead". This also suggests that their forehead is only about three finger widths high.
by hidispenser January 25, 2005
Get the threeheadmug. When three people have oral sex together in a circle at once.
Person A goes down on Person B, who goes down on Person C, who in turn goes down on Person A.
Person A goes down on Person B, who goes down on Person C, who in turn goes down on Person A.
by ajwfs March 24, 2008
Get the threeheadmug. by lexi666 May 29, 2020
Get the Threeheadmug.