What does it mean to “Lack” or to be “Lacking”?
The slang terms “Lack” & “Lacking”(also spelled Lacking” are verbs which are mostly used to reference walking without a gun or being unprotected.
Lack means not having or falling short.
Lackin' means not paying attention or being caught off guard.
Read: What does “Jawn” mean?
Read: What does “Plug” mean?