The initial idioms of the letter C

Christmas disease	Christmas graduate
Christmas tree	Christmas tree bill
Christmas	chrome
chrome dome	chrome horn
chrome-dome	chronic
chub	chubby
chubbo	Chuch!
chuck (something) in (to something)	chuck a dummy
chuck a U-ie	chuck away
chuck down	chuck into
chuck it down	chuck it in
chuck out of some place	chuck over
chuck overboard	chuck something down
chuck (something) out	chuck under the chin
chuck up	chucked