-Person 1- "may i have uh, you know, um, that, uh, that thingy thing, you know, um, the one, on the table, by the pepper..."
-Person 2- "you mean the salt?"
-Person 1- "Yeah! that's it!"
Word used as a wild card: if you don't know someone's name (as in what's-your-face) , if you don't know what the 'thing' is called, but also doing 'some' sexual act.
- Hey Thingywingy! How are you?
- I'm looking for that small metal thingywingy.
- Have you been doing the thingywingy with her?