Also the nice thing is that since bit (general nonbitcoin word) is a discrete unit there is no such concept of sub bit.  Therefore without spelling out "coin" it becomes disambiguous that the speaker is talking about only bitcoin.

"Bits" is a good colloquial for uBTC.  The idea that people won't be able to figure it out is just silly.  "That will be 22 bits please", short, simple, easy.  It still provides two decimal places which means easy integration into legacy accounting software.