Howard's moustache
From The Big Bang Theory Wiki
The guys came back from the Arctic with long hair and full beards. They all shaved when they got home. Howard, however, left his moustache, calling it a Clooney. Raj called it a Mario and Luigi. Howard shaved it off shortly thereafter (0301).
Some months earlier, Howard had talked about growing a moustache, mentioning that George Clooney also had one (0213).
