weeny

[wee-nee] /ˈwi ni/
noun, plural weenies.
1.
adjective, weenier, weeniest.
2.
tiny; very small:
Give me just the weeniest little piece, please.
British Dictionary definitions for weeny

weeny

/ˈwiːnɪ/
adjective -nier, -niest, -sier, -siest
1.
(informal) very small; tiny
Word Origin
C18: from wee1 with the ending -ny as in tiny