move sideways move unobtrusively or furtively; "The young man began to sidle near the pretty girl sitting on the log
If you sidle somewhere, you walk there in a quiet or cautious way, as if you do not want anyone to notice you. A young man sidled up to me and said, `May I help you?'. to walk towards something or someone slowly and quietly, as if you do not want to be noticed sidle up/towards/along (Probably from sideling (14-19 centuries))