Tekkerz basically means skill. For example good tekkerz means good skill, bad tekkerz means bad skill and UNBELIEVABLE TEKKERZ! is basically the dogs bollocks. When people just say "tekkerz" it is usually good.
Basically means technique. In football, if you cannot control a ball rolling along the floor at 5mph, then you will be deemed to have no tekkers whatsoever.
Billy: Ur tekkers are poor bruv!
Lewis: Sure mine may be shit but so are urs!
Billy: Tru say