jacks 

another word for cigerettes

hey man i'm going to 7-11 to get a pack of jacks

jacks by eric August 3, 2003

Jacks 

Toilet in Ireland. Usually the gent's toilet. Usually covered in piss maybe with a shite in the urinal. Accompanied by humerous and often informative grafitti.

Great stories on the walls in the Jacks! I've piss up to my knees though.

Jacks by D November 10, 2003

jacks 

pay phones

jacks by Anonymous June 6, 2003

Jacks 

A derogatory name used for the Australian Police Force made famous by the TV show Underbelly.

Fuck there are so many jacks around these days

Jacks by Jonny AA March 30, 2009

jacks 

A quantity of marijuana worth £5 i.e halh a tens, a quarter of an eighth.

I've only got enough to pick up a jacks.

jacks by high as a kite April 20, 2004

Jacks 

1) Irish slang for toilet. Derived from Union Jack, the British flag.

2) Term referring to Dubliners, since they uphold British traditions more than any others in Ireland. The name comes from when they waved Union Jack flags during a visit from the Queen.

1) Lads, I'm bursting for the jacks.

2) Ah, fuck. A bunch of jacks.

Jacks by Snake July 24, 2005

jacks 

alone; single; partnerless; not in a group;

i'm on my jacks.
or
i'm on my j's (abbrev)

jacks by Greaser November 9, 2003