Verb; putting your hand so your palm is facing upward and put it under someones boob or moob and thrusting up.
Created in Illinois (LZMSN)
Orginally "swoop".
To drop a gentle hint during conversation about something that you want to be asked in more detail about, but do not want to change the subject to by yourself.
A serial shlooper would keep mentioning the name of someone they fancy, so that others will start to talk about her/him.