It is a Polish last name not these fake terms. It does not mean; brothers,close friendship, bro's, buddies or any of those types of words. Look it up in a Polish to English Dictionary. It is a typical Polish last name. And yes I am a real Polish Broski writing this!
'Hey broski. Whazzup?'
"Just dated a chick for a half hour and spent the rest of the day hitting on new ones'
'Cool i laughed at the losers around the school and hit them with a football."