I remember when I was at school, the teacher asked the class to describe any 'Collective Nouns'. Mary raised her hand and said... "A herd of cows". The teacher said... "Very good Mary". James then raised his hand... "A flock of sheep miss". The teacher said... "Very good James". Susan then said... "A gaggle of geese miss". The teacher said... "Brilliant Susan". The teacher said... "What about you David, can you think of a collective noun that's better than the others? I said..."Yes miss, a dose of crabs".