To be "with the group" or to "be cool" as determined by your peers. The "trolley" would be something one would want to be on.
One may also want to make it a point of saying that someone is not on the trolley, instead of just saying that they should get on it. This implies that the person is so uncool that they cannot even try and be cool.
Another popular use is pointing out that a particular member of your friends circle is on the trolley in an attempt to rub it in the face of the person who isn't.
This phrase is usually used in a ribbing manner towards friends.
(After making a faux pas, doing something the group would consider uncool, etc) Come on Jason, get on the trolley.
similar to "got off my kool aid," but with way more Italian jealousy. When an absolutely gorgeous redhead is involved, an Italian guy would say "get off my red trolley!"
slip of the tongue perhaps,
Those idiots who drive around in a ridiculously raised pick up truck, making a top heavy vehicle even more top heavy and unstable
A:*gah*
B: "Whats the matter"
A: This dam prickup is blinding me.
B: Stupid thing's, as if there lights weren't blinding enough as it is.
Someone who jumps from one relationship immediately into another one.
Serial monogamists can not stand to be alone and often suffer from vast commitment and insecurity issues.
Because they jump into relationships immediately after the previous one has ended, serial monogamists typically don't take the time to reflect on their behavior or why their previous relationships failed; thus, they end up making the same relationship mistakes over and over again.
Person 1: Damn, Dustin already has a new girlfriend?! It's only been two weeks since he broke up with his fiance! I think he's a sociopath.