A completely ironic phrase commonly used to define someone who does something mildly cool or impressive. This phrase should never be used seriously, as it ruins the joke, and makes you look retarded.
by DudeishBroski November 14, 2018
Get the you sly dog youmug. When attempting to sit next to a particular person in a University of Sydney Economics lecture, this move should be undertaken. It involves isolating the person prior to the lecture, then walking up to person in a way that they will not see you (although if that happens, it can't be too bad). Once behind this person, follow them into the Economics lecture, thus following them into the row they decide to sit in, THUS, sitting next to them.
Finito.
Perfecto.
Finito.
Perfecto.
by pavmeister April 22, 2011
Get the sly walking behind her movemug. The all time ruler of the earth and sexy lady killer, don't cross him or he will cut you down with his twin fire and ice swords. He will be born in the year 3000 and from that point on will rule everything that man has discovered and created. See also God
by bill cosby April 2, 2005
Get the Sly Vandalsparkmug. A homosexual man who engages in anal sex (i.e. he takes meat in through the back door), also implying that he does so secretly.
by Gruntyface July 14, 2010
Get the sly butchermug. by Sistersimon February 4, 2019
Get the Sly dogsmug. by DanBizzle007 April 17, 2008
Get the Sly Merkmug. 
Get the Slymug.