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!"
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the USCoast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.