To help someone out by
1) filling in,
2) backup their excuse 3) going along with their lie,
cosign for them, corroborate
their story
4) provide supporting firepower for
them in a shootout {Hollywood}
I got a hot date, can you cover my shift on Friday night?
He told his mom that he'd been at my house all night. I covered for him.
When a band plays a song that has already been written by a old band, and changes it slightly to sound better. But thats not always the case.
Metallica bitched about how people were stealing their music on Napster, but then they turn around and steal a whole bunch of songs by other artists to make their crappy Garage INC cd.