KGT 95:  many native Klingon alcoholic drinks have names that do not contain the word HIq. Among these are ... the very strong chechtlhutlh (chech'tluth). (The fact that chechtlhutlh seems to be made up of two verbs related to drinking - chech ["be drunk"] and tlhutlh ["drink"] - is no doubt coincidental.

It's a strong Klingon liquor that Bringloidi leader O'Dell agreed had more of a bite than the replicated whiskey.  Worf ordered him some from the Enterprise-D's replicator in TNG "Up the Long Ladder".