Filp is a replacement of flip witch is a replacement of frick witch is a replacement of fuck.
so so you can use this term to mock people who are acting childish.
First In Line Person. A filper is a person who is always first in line. They will rush to the front of the line for any kind of comfort item like food, showers, free stuff, but they are nowhere to be found when you need work done.
Kelly: Hey Leah, did you see how Dave jumped in front of Matt in the food line?
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.