1 definition by blancwene

Top Definition
An acronym for the phrase "Old Man in Speedo." Most often used while visiting tourist attractions like Disney World or Busch Gardens, to warn others of the approach of an older (usually European) man in a very small swimsuit.
Alert! Alert! OMIS approaching!
by blancwene November 16, 2006

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug