Moustaches are known as a "mustache" in American English, but the old-school spelling keeps the "o", which stands for "OMG check out that guy's mustache".
Today's moustache:
Yosimite Sam
Look at this guy. His whole body is one half moustache. His moustache has creeped all the way up his face and also combines into a unibrow in an unprecedented 'stache-takeover. No question, Yosimite gets the award for moustache of the week.
