1. slang To move with twisting, writhing, or otherwise irregular motions; to wriggle or wiggle. The baby just swiggled and squirmed as I tried to change her diaper. This piece keeps swiggling in the wind. Any way we can tighten it up?

2. slang To drink alcohol excessively. The old coot just sits at the bar swiggling beer and whiskey, shouting abuse at anyone who walks by. You swiggled all my wine, you lush!