When one who is in a relationship finds themselves constantly looking around for their significant other at seemingly random times in hopes the other will randomly appear.
Also used when texting, where there is a lull in the conversation and you finds yourself staring at your phone or checking it often to see if a new text has arrived that you somehow missed in the 3 seconds since you last checked.
Can be abbreviated LPS
Bob: What is Steve looking around for?
Charlie: He's hoping that Susan will show up any minute
Bob: Isn't she in Georgia?
Charlie: Yeah but he's got lost puppy syndrome... he can't help but looking around