kolacho

From kolano +‎ -cho.

kolacho n

(rare) augmentative of kolano (“knee”) (joint in the middle of the leg)
Synonym: (more common) kolanisko
- 1936, Norbert Bonczyk, Stary kościół miechowski‎, page 130:
  Zaczęły się przesłuchy. Pan preceptór siad[a]ł / Na swym tronie jak bożek, kolachy rozkładał / Jak jakie[ś] krókwie i nas wołał po kolei / Ku sobie między nogi, potem jak złodziei / Uchwycił nas w te kleszcze.
  The questionings began. The précèptor sat / On his throne like an idol, spreading his knees / Like some ráfters and calling us one by one / Towards himself between his legs, then like thieves / He captured us in these ticks.

The nominative/accusative/vocative plural kolachy is much less common than the usual kolacha.

Declension of kolacho

More information singular, plural ...

Polish