Someone who isn't jewish but acts jewish, has jewish friends, and considers themself jewish.
"Did you see Mordechai's girlfriend? Would his parents be ok with her not being jewish?" -guy #1
"She's jewishish so his parents say its ok as long as they don't get married." -guy #2
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 $2million.