The initial idioms of the letter A

arse over tit	arse around
arsis	arse about
arsy	arsy-varsy
arsy-versy	art
art is long and life is short	artful dodger
article	artillery
poetic license	artistic
artist	artsy
artsy fartsy	artsy-craftsy
arty-farty	as
as . . . as	as a dog returns to his vomit, so a fool repeats h
as a duck takes to water	as a (general) rule
as a last resort	as you sow, so shall you reap
as a matter of course	as a matter of fact
on principle	as a result