to BACK someone UP	to support someone
to BACK OUT OF sth	to try avoid doing sth when you've promised to do it.
to BACK ON TO	Overlooks it from the back windows
to BACK AWAY FROM	to shrink back in fear from
to BACK DOWN	to apologise
to BE AROUND	to be still in the same place and so be able to be contacted
to BE OUT TO	To be aiming very seriously to do sth
to BE OVER	To be finished or ended
to BE THROUGH WITH	To want no more to do with sth or someone
to BE OFF 1	to leave
to BE OFF 2	to be cancelled
to BE OFF 3	to finish work
to BE OFF 4	to go bad, of meat, butter etc.
to BE UP TO STH/no good	to be doing sth mischievous or dishonest
to BE BEHIND WITH (one's work)	To have allowed more and more (work) to accumulate
to BE IN FOR	to be going to get usually sth unpleasant
to BE ON	To take place of concerts etc.
to BE OVER AT (a friend's)	to be ona a visit to a friend's house
to BE BEHIND it all	To be really responsible for it
to BE ON TO someone about sth	To be continually criticising someone about sth
to BE WELL UP ON sth	To know a lot about sth
to BREAK UP 1	To begin the school holidays
to Break UP A FIGHT	To interrupt and stop it
to BREAK UP 2	To disintegrate
to BREAK UP A CAR etc.	To knoc it into pieces
to BREAK UP of weather	zerwanie pogody
to OUTBREAK	The beginning of sth bad like war, epidemics etc.
to BREAK ONESELF OF A HABIT	To force oneself to give it up (habit)
to BREAK WITH someone	To stop having anything to do with someone
to BREAK WITH TRADITION	To do sth quite different and new
to BREAK THE NEWS to someone	To tell someone some bad news as gently as possible
to BREAK THE BACK of sth	I've done most of it and all the hardest part
to BREAK THROUGH	coś się pojawilo zza czegoś np słońce zza chmur
a BREAK-THROUGH	A major discovery in research
a LUCKY BREAK	A stroke of luck, generally for a criminal
to drive AT BREAKNECK SPEED	To drive dangerously fast
to BRING UP CHILD	to teach it manners etc.
UPBRINGING	education by the parents
to BRING UP A SUBJECT	To start talking about it
to BRING UP one's food	To be sick, vomit
to BRING STH ABOUT	To cause sth to happen
to BRING STH ON	To cause sth to happen precititately, generally used of illnes
to BRING SOMEONE ROUND 1	To invite someone to accompany you on a visit
to BRING SOMEONE ROUND 2	To help someone to recover after he has fainted
to BRING SOMEONE ROUND 3	To persuade someone to accept the rightness of your ideas
to BRING SOMEONE THROUGH an illness	To cure someone of an illness