2 definitions by RoisinSamuel

STM

Used on Snapchat , normally on lines or shoutouts. Normally means ‘Should Talk More’ but is also an abreviation for ‘Sent To Most’.

‘Like my recent on instagram stm’

‘Sarah - funny , very nice , so pretty , stm!’

by RoisinSamuel November 8, 2017

ISI

Used on Snapchat , means ‘if seen ignore’. Sometimes said as iis, ‘ignore if seen’.

Going out now , isi

by RoisinSamuel November 8, 2017