DS is 2.9, speech improving but still a bit unintelligible to other people at times. Thankfully, given that he's picked up "for fuck's sake" as an expletive.
Ignoring in the hope it'll be less interesting and will fade away hasn't worked. He mostly mutters it to himself when frustrated. Think it's time to try retraining him to use something else.
Any great suggestions for pithy phrases that aren't sweary?