Take a bus 

Get lost (said to someone as if they cannot afford their own wheels, a cab, or limo.)

Eddie: Yo' sister has a dope set of hoochies.
Freddie: Take a bus, junior 'fore I bust a cap in yo' nasty ass !

or:

Eddie: I call shotgun!
Eddie: Take a bus, loser.

Take a bus by 209 fo' evah July 7, 2010

take a leak behind the bush 

(v.) to conduct operation where the actions cannot themselves be seen, but any intruders can be.

We have to take a leak behind the bush with this new car, so our rivals don't see what we're up to. That means we do it in your dad's garage.

take a leak behind the bush by Kung-Fu Jesus May 5, 2004