Originates from the poorer, working class people from the North side of Dublin. (see knacker.)
Anto: Yeah, jus' lemme have a North Side Shower foirst. *sprays Linx* Let's go, da 75 won't wait for yizzes.
While for most civilised people, this might seem repugnant, the practice works for Northsiders because they are all Knackers (member of the Irish travelling community or a Northsider or anyone from Limerick)
That bleedin' knacker must have settled for a Northside Shower because after the aerosol blew away the flowers started to wilt.