A phrase telling girls that you have good game without wasting too much of their precious time. Chicks love it when you cut to the chase. Say this to females as they walk by you on the sidewalk. You should be somewhat intoxicated and in the mood to heckle. Fear of rejection will lead to failure. Often times this term will raise curiosity in the female and lead to her joining you in a game of beer pong which could lead to things like sex for that evening.
Dude 1: Hey ladies, I Have Good Game!!!!
Girl 1: Har Har, thats cool.
Dude 1: No seriously, come play beer pong.
Girl 1: Okay, I'm so intrigued by your bluntness and ability to not waste my time by telling me straight up how good your game really is. I will play beer pong with you and perhaps let you touch my boob later tonight.
Tip: This term is often most effective when used in coordination with "I'm hung like a hamster." See: Hung Like a Hamster here on Urban Dictionary.