getting lucky, similar to getting some refers to having sex. Usually uses by females to express their willingness to share the bed with someone, or as a comment by males to say that they hope to get a girl into bed later on, see examples.
Essentially, meaning to have sex, the phrase "get lucky" usually refers to someone who wouldn't typically be able to perform the act of sexual intercourse with someone else.
See also get laid, get some action
Bill: *yawn*
John: Woah you look tired.
Bill: Yeah i was up all night last night.
John: Why?
Bill: *snicker*
John:?
Bill: To get lucky.
John: Goddammit Bill.
Used to be that just getting laid was getting lucky; now, if the girl you've got your dick in doesn't have her tongue in another girl's pussy, you're barely gettin' laid. Man I love the new millennium.
By Adeline
Get Lucky
To be chosen out of many great people, because there was just something about you someone had tolove!