by Mattym719303 January 26, 2021

Don’t be slying about your friends
by Mattyice719 January 6, 2021

by Naevai April 3, 2009

To do something cunningly, preferably without any one seeing, apart from your best mate to prove you did it
by Jizz muffin May 20, 2003

Shorter, easier way of saying
'on the sly' meaning 'in secret' or 'not obviously'.
Usually pronounced like 'ont sly' by people from the north of england.
'on the sly' meaning 'in secret' or 'not obviously'.
Usually pronounced like 'ont sly' by people from the north of england.
by cocacolaprincess21 August 8, 2007

abbreviation for "No, seriously"
by holidayxvii April 19, 2008

by Estafuton February 28, 2009
