/'bɑ:stəd; [US] 'bæs-; `bæstɚd/
n
1 illegitimate child 私生子
*[attrib 作定语] a bastard child/daughter/son 私生儿[女/子].
2 (sl derog 俚, 贬)
(a) (usu male) person regarded with contempt; ruthless or cruel person （通常指男性）被人瞧不起的人, 冷酷无情的人, 残忍的人
*You rotten bastard! 你这下流坯!
* He's a real bastard, leaving his wife in that way. 他真狠心, 弃妻子于不顾.
(b) thing that causes difficulty, pain, etc 使人感到为难、疼痛等的事物
*It's a bastard of a problem, this one. 这个问题真使人伤脑筋.
* My headache's a real bastard. 我的头疼得真要命.
3 (sl 俚)
(a) (used to address sb, usu a male friend, informally 用于称呼某人, 通常为男性朋友, 用于口语)
*Harry, you old bastard! Fancy meeting you here! 哈利, 你这老家伙! 真没想到在这里遇见你!
(b) (used for showing sympathy, usu about a man 用以表示同情, 通常用于男子) unfortunate fellow 不幸的人
*The poor bastard! He's just lost his job. 那可怜的家伙! 他刚失去了工作.
4 [usu attrib 通常作定语] not genuine or authentic; showing an odd mixture 不纯的; 不实的; 杂乱的
*a bastard style, language 混杂的文体、语言.

n[C]
[Date: 1300-1400; Language: Old French;Origin:Medieval Latin bastardus, probably from bastum 'saddle for carrying bags'; probably from the idea of a child produced as a result of sex with a traveler]
taboo a very offensive word for someone, especially a man, who you think is unpleasant. Do not use this word.
　You lying bastard!
spoken informal not polite a man who you think is very lucky or very unlucky - often used humorously
　He's gone straight to the top, the lucky bastard.
　The poor bastard fell off his horse.
BrE spoken informal something that causes difficulties or problems
　Life's a bastard sometimes.
old-fashioned someone who was born to parents who were not married