Puppy Love Syndrome: usually occurs in teenagersand it is when they think that they are in love, but in reality it is just puppy love.
Dad 1: Ya i had 2 take hi in to the doctorthe other day...
Dad 2: y?
Dad 1: he has a bad case of PLS..
Dad 2: o....is that like mono?
Dad 1: nope its Puppy love syndrome....
Dad 2: o shit i hope my daughter does'nt get infected too....
or "lateral secure position." A technique used by emergency responders to orient an unconscious person so that they're slightly on their side in order to keep them from choking on their own vomit. Used often to describe being blackout drunk, whether or not you actually passed out or were put in actual PLS