Red line

Some people & certain personality traits are just a red line. ( my privacy, my loved one, my routine, my life)

Red line if you cross it more than once I’ll get disgusted!

epic red line fail

When one uses large fingers for typing word documents and is unable to spell correctly MS Word will unline the entire document with wavey red lines.

Andy "Dude, your word document is such an epic red line fail, learn to spell"

Paul "sound"