a shot across the bow

Sitting on the toilet and letting loose a trumpet blast of a fart before taking a big dump.

"Hey Sarge! Did you here Jones just now in the head? Sounds like he (Fired A Shot Across The Bow) before he let loose one Hell of a depths charge!"

shot across the bow

During a blowjob, when the giver pulls away for any reason before finishing, leading to the receiver to ejaculate on the giver's cheek or chin.

Guy: Man, I was getting good head the other night, but then she pulled away and I gave her a shot across the bow.

shot across the bow

When a man ejaculates (usually after a blow job) and the jizz either hits the giver across the cheek or chin.

Guy: That chick sucked me off so hard last night that when she pulled away, I gave her a shot across the bow!