A counterattack either literally (in fencing, after parrying a lunge attack, or figuratively (in conversation, after an insult)
1) Ian scored a point by riposting to Andy's shoulder.

2) He riposted when they said 'civil unions are just as good as marriages' by quoting the Massachussets Supreme Court.
by Zach Sullens September 19, 2007
Phenomenon where a person has to be subject to Ignominy to make someone else look bad for knowing about NSFW content by name.
In my group chat the other day, my friend tried to make fun of me for knowing a porn actor's name in front of everyone but fell for the Coomer's Riposte.

"How do you know who Mia Khalifa is?"
"Wait, how do YOU know who that is?"
by Hellen Keller Official December 30, 2022