chum

　　[释] a good friend;

　　[例] We've known each other since we were 9 or ten. We're old chums.;

　　chump

　　[释] someone acts like he knows many stuff but he doesn't;

　　[例] He talks a lot but nothing of any relevance comes out. What a world champion chump!

　　chunder

　　[释] Australian Slang: to vomit;

　　[例] Jenny's gonna drive this time? I'd better take some dramamine, or I'll chunder like last time.;

　　chunk

　　[释] something large/massive;

　　[例] I do like party, but I hate clean the large chunk of mess after party.

　　ciao

　　[释] "Hi"/"Bye";

　　cinch

　　[释] describing an action that's extremely easy;

　　[例] This pie looks like a cinch to make.;

　　circle the drain

　　[释] to be near failure/death;

　　[例] The shop where I work is circling the drain. I should start finding a new job.