A phrase said by someone who gets destroyed in an online game, most likely halo and in a match where the person dies a lot and often. And during that match the person doesnt usually get a lot of kills.
Means the only way the other team is winning by such a large margin is by modding.
*person gets killed for the 19th time and has 2 kills, and the other team needs one more kill to win*
"WOW, NO MODS"
"no mods i swear"