to troll a troll that trolled a troll who trolled a troll
random guy : i herd u liek mudkipz
troll1 : i no liek mudkipz, mudkipz r n00b
troll2: i liek swampertz
troll3 : noes swampertz r trollish
troll4: tr00lllls cannot squirt water u idiot
troll5: fuck you they use hydro pump not squirt water you idiot go rot in hell pig!@#$!%!@fucker
troll4: you got trolled retard
troll5: you got countertrolled troll!
When you avoid a troll's trollish act (or taking it deep) and countering it by successfully trolling him/her back. This action is hard to pull off.
Student: *sitting in classroom with a female teacher and other students*
*The female teacher starts reminiscing about her past*
Teacher: "Back in my day my friends used to call me shortstuff cuz I'm short."
Student's troll comment: "I wonder how long ago that was?"
*Whole classroom laughs*
Teacher's countertroll comment: "I don't know, why don't you ask your father?"
Classroom: You just got countertrolled!