you suck

You know its GG when hotshot is jungling (I like hotshot but... its true.)

You know its GG when Vladimir grabs clarity.

You know it's GG when...
PENTAKILL

you know its gg when your jungler dies to a minion camp

You know its a GG when you make one comment that you are the opposite gender so everyone starts making fun of you... until you have more kills than the DPS's and you're playing support.

True story: Playing Soraka and everyone thought they were screwed cause I am really a girl. I got 21/0/12 that game and the next highest was 3/19/10 and it was a draven.

You know it's gg when people are tower diving at lv 1

You know it's a GG when both your teammates go 0/15... vs easy bots.

You know it's GG when your entire team jumps a Teemo in the first minute of the game and you hear "ENEMY PENTAKILL!"