Originally a helmet sticker was a team decal given to a player that made a great play. Generally players with a lot of helmet stickers are really good players. Originated at the Ohio State University by coach Woody Hayes and trainer Ernie Biggs in 1968.
Guy 2: Yeah too bad it took me 6 months to figure it out
Guy 1: Shoulda listened to me.
Guy 2: You deserve a helmet sticker for that one.
Guy 1: I got that chick's number
Guy 2: She's a 9 your a 5, you deserve a helmet sticker.