ambi-texting is the art of texting after you have taken an Ambien. You never fully realize what you've tried to text until the next morning when you check your history and can't make out the meaning.
Text from my GF: IIII kknv66 &ddn 33)k##............zC
Meaning: I love you. Gnight.
Honey, did you take a pill before bed last night? Yes, why? Because you were ambi-texting me before you went to sleep.