裁判沙汰 (court matter, lawsuit)

The compound 裁判沙汰 ('a court matter, a legal dispute, taking something to court'). 沙汰 ('affair, matter') is itself archaic, originally 'sand-rinsing' (sifting through facts), now used for noisy disputes or troubled matters. The phrase carries a slightly disapproving 'this has gotten out of hand' flavor.