literally
Concise Oxford English Dictionary © 2008 Oxford University Press:
literally/ˈlɪtərəli/
▶adverb in a literal manner or sense.
■ informal used for emphasis while not being actually true: we literally killed ourselves laughing.
usage: In its standard use literally means ‘in a literal sense’. In recent years an extended use of literally has become very common, where it is used for effect in non-literal contexts (as in we literally killed ourselves laughing), but this use is not acceptable in standard English.
'literally' also found in these Oxford entries:

