did see alan in that fight? yeah, i don't want to mess with him because he's freaking shag nasty when he gets in a scuffle
someone or something that's so mean that they will fight or act with merciless intent to get want they want or accomplish
"did see alan in that fight? yeah, i don't want to mess with him because he's freaking shag nasty when he gets in a scuffle" What is the definition of "shag nasty"?