A text message from your partner that does not end with 'x'. You know you're in trouble when you get one of these, especially when you're unaware of the pretext.
'Dude, I just got a text that said 'I've got your flip flops''
'Did it end in with a kiss?'
'Nah. It's a No x Text, man!'
'Oh dear. Shit gonna hit the fan, bro!'