It doesn’t mean anything. It’s just a load of old rubbish that someone asks you what it means without giving an answer and refuses to tell you because he/she doesn’t know what it means either.
Person: “Hey, do you know what ‘Her Mexican’ means?”
You: “What?”
Person: “Her Mexican”.
You: “No?”
Person: “Ha, you don’t know what it means, see ya!”
You: “?? Wft?”
You: “What?”
Person: “Her Mexican”.
You: “No?”
Person: “Ha, you don’t know what it means, see ya!”
You: “?? Wft?”
by Dozy_Leo February 13, 2018
Get the her mexicanmug. Forever that girl, forever the trendsetter, forever the woman the haters want to be or can't have. Forever the one. The girl who forever gets more love than hate. FOREVER HER.
by Forever That Bitch March 8, 2023
Get the Forever Hermug. by Dan D. Lion February 7, 2023
Get the Teenage-hermug. 
I'm done with her.
by bombus crotchii November 13, 2017
Get the done with hermug. by COOMSOCK April 13, 2022
Get the PIPE-HERmug.