A ganger both a formal and slang term meaning the head or supervisor of a small unit or "gang" of labourers, often unskilled or unqualified, such as the Navvies (Navigational Engineer in PC English) dating from the times of the Canals and Great Railways in the United Kingdom.
Referenced in song by the immortal Dominic Behan ballade "MacAlpine's Fusiliers" with the verse:

"I've worked till the sweat near had me beat with Russian, Czech and Pole,
At shuttering jams up in the Hydro Dams, or underneath the Thames River in a hole,
I grafted hard and I got me cards and many a ganger's fist across me ears.
If you pride your life, don't join, by Christ, with McAlpine's Fusiliers."

References: Native UK English speaker and Anglo-Irish-Hiberno-musicologist (author)
Formal literature: Journal article Mr. Walter G. Cocks, Member, "NOTES ON THE MAINTENANCE OF PERMANENT WAY." in ""Civil Engineering" 1911:"A Bad Top: -this is generally the result of slack joints, which can be caused by bad or insufficient packing, weakness in fish plates, loose fish-bolts, etc., to remedy which necessitates constant attention on the part of the maintenance gangs, the results depending on the intelligence possessed by the GANGERS.
"I've worked till the sweat near had me beat with Russian, Czech and Pole,
At shuttering jams up in the Hydro Dams, or underneath the Thames River in a hole,
I grafted hard and I got me cards and many a ganger's fist across me ears.
If you pride your life, don't join, by Christ, with McAlpine's Fusiliers."
by SpeakProperFokkinEnglish May 30, 2021
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A ganger is a girl who dresses like a gangster but still feminine. They will often be found in quantities and only on their own when trying to meet up with other gangers.
by twiggy675 October 21, 2010
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Someone who is unusually skinny or has abnormally long limbs.
by Grant Wasson March 16, 2008
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A ironically gay man part of an ironic online troll group called patiya gang
damn james was acting kinda gay yesterday.
Yeah i heard he is a patiya ganger
by Beefdvd July 1, 2023
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A less intimidating sounding name for a member belonging to a gang.
"Dude Ganger Bangers are bogus, killing people and stuff."
"Naw Dude they have it worse, All they need is a little Love:)"
by JesusLover56789 September 29, 2011
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The word to describe having a three-way sexual liaison with two other unrelated individuals who could/would be described as doppelgangers (very similar physical characteristics). Often shortened to Double G'd.
This phrase does not apply to identical twins.
"I'd totally love to have a double-ganger with them two doppels" ;
"Can't believe Alice got double g'd at the weekend"
by Double-Ganger August 16, 2021
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