This is a metaphor that describes the complaints that are aired by people who have just taken a right on the struggle bus.

It can also be used to describe situations where some is constantly complaining about something over and over again
Jack: *spills water on shirt*
John: Wow dude you are really ridin the struggle bus today
Jack:Shut the frick up dude it wasnt my fault I hate you
John:....and here comes the complain train

When Jack hates his job soooo much and he tells everyone on earth about it like 50 times, Jack is riding the complain train.
by BK Lounge22 July 15, 2013
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