The initial idioms of the letter C

cut the funny stuff	cut the Gordian knot
cut the ground from under	cut the ground from under / feet
cut the ground out from under	cut the ice
cut the mustard	cut the pie up
Cut the comedy!	cut the umbilical cord
cut (one's) eyeteeth	cut (one's) teeth
cut it fine	cut throat
cut through	cut through red tape
cut ties with (someone)	cut to
cut (someone) to pieces	cut to ribbons
cut to the bone	cut to the chase
cut to the pith (of something)	cut up about someone/something
cut up rough	cut water off
cut with	cut wolf loose
cut your peaches	cut (one's) wisdom teeth