the time off between swings shift (12:30 pm-12:30 am) and mid shift (8:30 pm-8:30 am) where a person only gets about 30-36 hours to adjust their sleep schedule before another 7 day work week
sailor 1- "Hey man what shift are you going to be on?"
sailor 2- "Just getting off of swings today, going into swids."
sailor 1- "Oh man that's rough, hope you enjoy no time off between 80 hour work weeks."
sailor 2- " Don't remind me."