-or- it can be used in the past tense - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Person 1: Dude i just totally Roflshismed my pants after watching him play basketball
** Since the -ed ending has been added the acronym can no longer be used, but instead it is implied that the user of the word rolled on the floor, laughed so hard they shit themself except in the past tense**