drop by v. 1. or drop around To make a short or unplanned visit; go on a call or errand; stop at someone's home. 
 Drop by any time you're in town.
 Drop by any time you're in town.  Mv sister dropped around last night.
 Mv sister dropped around last night.  Don't forget to stop by at the gas station. Synonym:
 Don't forget to stop by at the gas station. Synonym: DROP IN. 
2. or drop into To stop (somewhere) for a short visit or a short time. 
 We dropped by the club to see if Bill was there, but he wasn't.
 We dropped by the club to see if Bill was there, but he wasn't.  I dropped into the drugstore for some toothpaste and a magazine.
 I dropped into the drugstore for some toothpaste and a magazine.  [TahlilGaran] English Idioms Dictionary ▲