Found 8 phrases starting with AV:

avant la lettre	An example of a term before the term was coined. Describing a term used anachronistically.	Rate it:
avast there!	Attention all hands!	Rate it:
average bear	The norm; an average person; Used in comparisons	Rate it:
average joe	Alternative spelling of average Joe.	Rate it:
average out	To acquire a specified average value as more instances occur.	Rate it:
average up	to calculate an average or rough figure.	Rate it:
avoid like the plague	To shun, or evade if at all possible.	Rate it:
avoir du pois lay	Stealing brass weights off the counters of shops.	Rate it:

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A fans

B orchestra

C choir

D audience