Definitions by GI75

drive the bus 

When a male is having sex with a female in the doggy style position, the male presses his thumb against the girls butt hole. His hand and fingers should be spread across and grabbing her booty kind of like you would grab a steering wheel in a vehicle. Inserting the thumb is known as honking her horn as she will most likely yell upon insertion.

Dick and Jane were going at it doggy style when Dick decided to drive the bus to see how far she would let him go.

drive the bus by GI75 December 11, 2008

honk her horn 

When you drive the bus on a girl as you're having sex with her, you insert your thumb into her booty to illicit a yell, moan, shout, curse, etc. from her.

Dick was driving the bus on Jane when he decided to honk her horn. She yelled and moaned in approval!

honk her horn by GI75 December 20, 2006