A word that is almost exclusively used in Northern Ireland.
It is a rather simple insult/comeback, it means 'suck the back of them' with 'them' being testicles.
For non-Northern Irish people it is pronounced 'sucka-backy-im'. That's IM as in TIM.
John: Here mate that's my football, giz it back ya wank James: Na mate my magot me this one
John: Mate, its the same ball, just giz it back!
James, Na suckabackyem ye ain't gettin it.
A Shackteau is a humble, weather-beaten, structurally questionable shelter located in a spectacular or highly coveted place—Wales, Jackson Hole, Sun Valley, Crested Butte, coastal Maine, the Alps—where the building itself may be worth almost nothing, but the dirt, view, access, and mythology make it absurdly valuable.
In use:
Shackteâu - We thought it was an abandoned shed until the realtor called it a rare alpine Shackteâu with unobstructed views and listed it for $2 million.