lad       
noun [ C ] uk/læd/ us/læd/
 男孩;少年;小伙子
a boy or young man
  A group of young lads were standing outside the shop. 一群小青年站在商店外面。 
 He's a nice lad. 他是个很不错的小伙子。 
 The prime minister's a local lad (= he was born and lived in this area). 首相是当地人。 
 lads and lasses (= boys and girls) 小伙子们和姑娘们 
 [ as form of address ] Come on, lads, let's get this job finished! 来吧,小伙子们,咱们把这个活儿干完! 
 - More examples
 - You do that once more and you'll get a clip round the ear, my lad.
 - By gum, he's a big lad!
 - He was a young lad of 16 when he first came to the big smoke.
 - A big strapping lad like you shouldn't have much difficulty lifting that!
 - He's a canny lad.
 
Idioms     
a bit of a ladidiom UK informal 放荡不羁的小伙子,浪荡公子
a young man who has sex with a lot of different women
 the ladsidiom UK informal (男性)同伴,伙伴;哥们儿
used to refer to the group of men that a young man spends time with socially, especially those who he drinks alcohol with or plays sport with
  I'm having a night out with the lads. 我要和几个哥们儿晚上在外面玩。