lo /ləʊ $ loʊ/ interjection
[Language: Old English; Origin: la]

1. old use used to tell someone to look at something that is surprising

2. lo and behold spoken used before mentioning something surprising that happened – used humorously:
We had just been talking about John when, lo and behold, he walked into the room.

[TahlilGaran] Dictionary of Contemporary English ▲

LO
Lights Out 
Locals Only (surfing slang)

[TahlilGaran] Acronyms and Abbreviations Dictionary ▲