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After going down on a bitch for ages with stubble it irritates her skin around the fanny. Rash by Moustache
Hey wanna fuck again Angel?

"Ehh, no way,Stacherash is killin me"
by Graham Wallace August 05, 2007
The inevitable rash one gets after experiencing oral delight from another, possessing an outdated facial pattern called a mustache.
- Hey baby, wanna show me your O face?
- Hell no, the stache rash you gave me last night still hurts.
by youwantmystacherash July 28, 2008