Someone who tries to steal your business by offering the same service/product for lessmoney.
Javi Rox: Yo, I got these cheeseburgers! I sell them to you for a dollar!
Jay Nyce: I got those same cheesburgers for 50 cent!
Javi Rox: I hate that motherfuckin undercutter.
"Pick at your chode underneath the table and smear the underbutter on the chips and cards, you can use it against them later." "Aw dude, it smells like underbutter in here!" "How would you like my underbutter all over your face bitch?"
If you are male, it refers to one of your testicles, usually the itchest or sorest. If you are female then it refers to one of your breasts, usually the smaller or most sensitive one. Using it in plural refers to both organs / glands.
"Don't even try to kick me in my undercutters, beyatch!" or "My right undercutter is really sensitivetoday! Don't fondle it so hard!"
Someone or something that bites your ankles.
To a postman, an ankle biter is often known as a dog.
To an adult, an ankle biter may be a toddler.
To hikers, an ankle biter is sometimes a tick.
And so on.