To meet and communicate with another. May be done in groups or between two people. Soash may also be conducted over the phone or through text messages, IMs, forums etc.
Often, when used in it's noun state the verb 'to boot' is linked up. ie. To boot a soash. We boot a soash. A soash was boot.
"We were just soashing, Betty and I"
"Say, That sure was a swell soash"
"Jimmy and I thought we'd boot a soash"