intransitive verb. To slip or skid to one side.

intransitive verb. To slide sideways and downward in skiing.

intransitive verb. To fly sideways and downward in an airplane along the lateral axis to reduce altitude without gaining speed or as the result of banking too deeply.

"There's probably a lot of short-term sideslip in the twenty-second century, but by the time it reaches us, it all irons out in the wash. ""