If you sidle somewhere, you walk there in a quiet or cautious way, as if you do not want anyone to notice you.
例句
A young man sidled up to me and said, 'May I help you?'一個年輕人悄悄走向我說道，“我可以幫你嗎？”He was sidling into the bar, obviously trying to be inconspicuous.他悄悄地走進酒吧，顯然不想引起注意。