It's a greeting to people. As if to say "Hello people!" The word people is just in slang form. Either that or someone is in a store buying some actual peeps and are soon to say "goodbye peeps" as they eat them.
Update: Apparently there are other meanings to this throughout the internet, though I don't know them all.
GET OOFF MY CARRR
hello everyone,what's happening?
not being around people as much, OBVIOUSLY -.- Hello peeps, hows the global warming going?
yes. hello peeps
Peeps refers to a friend, or close person.
In this example, "peeps" is an abbreviation for "people."
peeps is a little phrase that means people like what up peeps!
bad peeps, good peeps, funny peeps, sad peeps, weird peeps, mysterious peeps AND LOADS MORE PEEPS!
it is yayayayay food black peeps
hi peeps how r u :)
Peeps live in a tiny village called PEEPVILLE. In Peepville all the peeps eat pez and the g peeps are pez peeps and all of the peeps are CRAZY.
If you mean how many PEOPLE live in Florida, the answer is 18,328,340. However, there are 200 million PEEPS which have not yet been eaten.
hello