enemy spotted 

When you dress up and roll play as the FPS game known as CS:GO and have spotted an enemy.

Terrorist one: Enemy Spotted
Terrorist two: Roger That

enemy spotted by Humpty Your Rumpty June 15, 2016

Enemy Spotted 

A term used to notify someone that someone who opposes you is in your line of sight.

Enemy spotted on the left *WHooSh*

Enemy Spotted by Kynin June 6, 2019

Enemy Boat Spotted 

A random phrase of general smacktardism spawned from the ability to spam radio commands in the MMOFPS Battlefield 2 on the map Strike At Karkand, which contains no boats.

Player1: We're under attack! Help us out!
Player2: Enemy Boat Spotted!

Enemy Boat Spotted by Mr_Blacky_IV July 9, 2006