"Endomcha mathu nabagi wari Facebook" appears to be a short phrase combining words from Kannada (a South Indian language) and English. A plausible reading:
"Endomcha Mathu Nabagi Wari: The Unspoken Rules of Honesty on Facebook" endomcha mathu nabagi wari facebook
In Manipuri social media circles, particularly on Facebook, " Endomcha Mathu Nabagi Wari "Endomcha mathu nabagi wari Facebook" appears to be