Top Definition
As in everything about a chick looks good, "but her mace", referring to a tear gas in the form of an aerosol spray which propels a lachrymatory agent mixed with a volatile solven in her purse that makes her hard to approach.
Bert: What you up to last night?
Lejosh: I was walking home from the bar and i saw this 10/10 chick walking on the curb...
Bert: ...sweet man did you get her digits?
LEjosh: ...but as i got closer she reached to her purse so i backed out, she was definitely a buttermace.
by Kechix November 26, 2010

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