L33t abbreviation of 'grammar' very popular these days in online games
Moferka: Hi, let's play, ok? I make room, ok?
Pesst: k but I r pr0 n u'll g0t pwned h4rd
Moferka: please, moderate your grammar
Pesst: z0mfg! j00 biatch sux meh balls and le4rn t3h l33t GR0MM0RZ nub0rz!!
Moferka: go away nerd...