Sitting in the passenger's seat

Earning the right to ride in the front passenger seat of someone's car. This is also the direct opposite of "riding bitch," where you are sitting center-backseat, sandwiched by your friends (aka: riding gay, riding whore). It is "shotgun"'s responsibility for controlling car temperature, changing radio stations, calling out landmarks, and flagging down hot girls.

Variations to "calling shotgun" can include paper/rock/scisors, coin flip, or being the first to yell "shotgun" when the driver pulls their car keys out of their pocket. Seniority rarely means anything when calling shotgun.

1. To ride in the front passenger seat. The phrase is a direct allusion to the armed guard who sat beside the stagecoach driver
2. To keep a watchful eye on something or someone

When a woman climbs on top of a guy just before he blows it. Any variation of girl on top applies - cowgirl, reverse cowgirl, etc.

Where you hang out a window doing a drive-by

To blow your brains out or contemplate the same.