Small, Usually an original character.
Bro, My friend Tommy is such a mousy.
A selfie taken from the perspective of a mouse (aimed upward from ground level).
The term was coined by English comedian Joe Wilkinson in the first episode of his 2024 Channel 4 series, "Joe & Katherine's Bargain Holidays", co-hosted by Canadian-Irish comedian Katherine Ryan.
"Wow, that's a cool mousie of you at the Eiffel Tower!"