(Verb) In regards to bartering and trading, the term "lowball" is used by greedy sellers who don't understanddepreciation and are attempting to make a buyer look bad.
In online gaming, the act of waiting for your teammates to injure an enemy player then striking the killing blow at the last minute. See also: Kill Stealing
Dammit, Johnny just low-balled me again! He's got 6 kills and 23 damage dealt this round!
A guy that comes to your yard sale real early, sees your 1989 Nintendo plus 50 games and offers you $5 for the box. Walks around the sale picking up everything expensive asking "Would you take $1 for this? How about $.50???". Then when they go to pay they hand you a $20 dollar bill for $3 of stuff!!!
The guy probably stores it all in a shed and sells it all on Ebay.
That Fuckin Lowball Lonnie offered me $1 for my $90 TI Calculator!!!!
Every time I have a yard sale a Lowball Lonnie shows up at 5am with $3 to spend.