English: Person who offers same service or product for less than a competitor in order to score more customers and market share.
Urban: Dat muvfukka who always comin up in here 'n gettin' all up in my shit talkin' bout how he roll. Playa hatin' ho stealin' muvfukka! ( I went to college in west philadelphia I am fluent in ghetto)
If someone is selling 1 ounce of weed for $100, the low-baller will offer 1 ounce of weed for $75 in order to make a quick profit and killing the competition regardless of quality. The 100 an ounce might be of good quality with no stems or seeds, but the $75 bag will be regular crappy american skunker with stems and seeds. The low baller here is riding on making a quick buck driving the market prices down.
Geek squad offers a service for $249.99 to come to your house and fix your PC. Most people around my way will do it for far less. like $50 dollars. thats geek squads fault. I hope they go out of business.
Somebody who makes an offer for goods/services which is absurdly lower than asking price. They attempt to "start low" to haggle you down to a price that is unreasonable.
I've been trying to sell the 24" Lorenzo rims from my Escalade on Craigslist, but I'm only getting offers from broke, ghetto ass low-ballers who waste my time. They act like they're serious buyers, then they show up and offer me half the asking price.