There are times when you can’t recall the name of a thing or a person. It’s up there on your mind, but you just can’t spit it out. You would probably say “Mmm… What do you call it?” Or “What was that thing…? Mmm… You know that thing.”
Here are two cool expressions that you can use when you don’t know or remember the name of a thing or a person’s name:
Thingamajig /ˈthiŋ-ə-mə-ˌjig/ and Whatchamacallit /ˈhwä-chə-mə-ˌkȯ-lət/
Meaning: Used to refer to or address a person or thing whose name one has forgotten, does not know, or does not wish to mention.
“Can I have that thingamajig… that thingamajig that mild, has firm texture, very creamy…”
“I can’t find the whatchamacallit that holds the paper down so that it won’t be blown away by the wind.”