What is Dooverlackie?
1.
A whatchamacallit. You know, a thingamajig. It's like a doohickey but not quite.
"Pass me the dooverlackie. The thing, that you use to open the other thing! Yes, that one!"
See
2.
when you can't remember a word or don't know it
oh my god he's such a ... dooverlackie!