Someone linked to this on facebook and I felt obligated to link to it here with Rosh Hashannah coming up.
For all the goyim:
Rosh = Head
Ha (prefix) = The
Shana/Shannah = Year
Rosh Hashannah = Head of the Year / New Year
Tova = Good / Happy
L’ (prefix) = To
L’ Shana Tova = To a good year!