"are you on glue?"
"this would be a huge red flag for me" (used, for example, when a DH has left a plate on the side instead of putting in the dishwasher - he CLEARLY has no respect for you etc etc)
"LTB" (similar scenario to above)
"this may be triggering" (because someone described a random scenario which might have happened to someone else. Surely life is potentially 'triggering'?)
"they're gas lighting you" (when two people appear to have had a mild disagreement where both parties are convinced they are right)
"livid", "incandescent with rage" and similar
"go NC with MIL" (because she invited them to a party when she KNEW they had something else on. She is OBVIOUSLY trying to manipulate the OP...)
And my pet hate "cancel the cheque". It stopped being funny on the original thread after about page 3, and it's definitely not funny now.
Plus most of the above ones already mentioned. If people genuinely lived their lives based on what I read on MN, no one would be with their partner because they would have LTB and they would have no family because they've gone NC. Do people giving this advice genuinely act so rashly in real life, or do they actually do what most people do in the first instance and talk to people?!