To an excessive degree. An adverb used to replace the use of an undeclarative so. It utilizes a similar meaning and usage as the word "too". Try substituting soo when you are tempted with the urge to say "many much"
A russian bride like that must have cost you soo much money.
Remember that Family Guy episode where Brian, Peter, Stewie, and Chris all had a technicolor yawn?
Ya, they threw-up soo much.