"ganker" means: In online gaming, a ganker is a player who ambushes or overwhelms others — usually weaker or solo players — with an unfair numbers or power.... There is a drug-related reference, so this is one worth noticing without overreacting. Many teens encounter such vocabulary through music, film and friends without any direct involvement. A neutral, curious conversation about where they heard the term and what they understand by it is far more useful than a confrontation. Watch for repeated context, not a single word.