up in (one's) grill adj 1. in one's personal space. ("Towards the end of the fight, they were both up in each other's grill.") Submitted by Rebecca Griffith, Hoppkinsville, KY, USA, 17-05-1996.
UP IN GRILL
Meaning of UP IN GRILL in English
Slang English vocab. Английский сленговый словарь. 2012