Schrodinger's sarcasm
When someone says something and based on the reaction of others will claim their previous statement to be sarcastic.
Phill: i think your an idiot
Rob: didn't you fail your GCSEs
Phill: jesus i was being sarcastic
Rob: i think this is a bit of schrodinger's sarcasm
Rob: didn't you fail your GCSEs
Phill: jesus i was being sarcastic
Rob: i think this is a bit of schrodinger's sarcasm