A female that typically bites the penis while preforming oral sex. Like that of a chainsaw cutting through wood.
John: Oh my god Sara has such a chainmaw!
Tim: I know I figured that out last week, I still have a bruise!!
Tim: I know I figured that out last week, I still have a bruise!!
by d00wrag July 19, 2011
Get the Chainmaw mug.