No... I don't *think* your bottom is a continuum (continual?) noun. But ask Jon for an independent assessment. =:o}

I can never remember what the proper term is for "a noun that applies to a continuum or fluid", i.e. to something that can't be counted (but can - usually - be measured), but there definitely is one. Possibly several.

And my favourite line of Rorvick's was always the "custard" one. First time I heard it, it bugged me, 'cos I'd never heard "custard" used as a singular noun before. =:o}