Answer: THANX

AnswerCrossword Clue
THANX"That's great," briefly
THANXCutesy expression of appreciation
THANXCutesy "Much obliged"
THANXLetter closer, perhaps
THANXShortened word of gratitude
THANXExpressions of gratitude: Popular misspelling.
THANXInformal word of appreciation
THANX"I appreciate it," in text messages
THANXInformal expression of gratitude