No backsies.
Pronunciation: /ˌnoʊ ˈbæksiz/
What does “No backsies” mean?
You can't take it back or change your mind. A casual, playful rule, often between friends or kids.
Example
You gave me the last cookie, no backsies!
More phrases to watch
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It's your call./ɪts jʊr kɔːl/
Can I see you for a second?/kæn aɪ siː juː fɔːr ə ˈsekənd/
On a roll./ɑːn ə roʊl/
Bright future./braɪt ˈfjuːtʃər/
Always have, always will./ˈɔːlweɪz hæv ˈɔːlweɪz wɪl/
Without further ado./wɪˈðaʊt ˈfɜːrðər əˈduː/
Make a fresh start./meɪk ə freʃ stɑːrt/
Another day, another dollar./əˈnʌðər deɪ əˈnʌðər ˈdɑːlər/