to avoid someone or something by moving to the side; to ease away from someone or something. The cowboy sidled away from the bar and drew his gun. He sidled away and snuck out the door.
to move close to someone or something cautiously or furtively; to move closer to someone or something gradually. Tex sidled up to Dolly and said howdy in a soft, shy voice. Dolly sidled up and picked the cowboy's pocket.