in abeyance	halted temporarily
be of fixed abode	be homeless
out and about	1) outdoors 2) travelling from one place to another
in the abstract	in a general way
of its own accord	automatically
agree to disagree	stop arguing because there's no chance of agreement
in arrears	in debts
cast aspersions	criticise
cost an arm and a leg	be very expensive
be thrown off balance	be surprised/confused
on the ball	alert
below the belt	cruel and unfair
be beside oneself with anger/excitement	to be extremely angry/excited
bide one's time	wait for a good opportunity
in the black	not owing anybody any money
in the red	owing somebody a money
blaze a trial	discover sth new
on the blink	stop working properly
go by the board	be rejected/ignored/no longer possible
cut to the bone	reduced to the minimum
out of bounds	prohibited (place)
pick someone's brains	ask somebody for an info/ ask for help