Definitions by comas

arch frenemy 

your worst/best enemy disguised as a friend

After Marge stood up Fred at the Prom, he thought "Marge is my arch frenemy."

arch frenemy by comas February 19, 2009

text echo

the arrival of a text message as one is simultaneously calling the recipient

Fred had the burning desire to call Marge. He texted her, then seconds later, called her. As she answered the phone, the text message from Fred arrived. "Is this a 'text echo'?" she asked.

text echo by comas February 19, 2009