informalpledge
nounUK /ɪnˈfɔːml plɛdʒ/
US /ɪnˈfɔːrml plɛdʒ/
A promise you make in a casual way, not in a serious official way.
She gave an informal pledge to help her friend move house.
OTHER MEANINGS
2. A spoken commitment made without any written record.
The two neighbors made an informal pledge to share their tools.
3. A friendly, non-binding assurance given in conversation.
He gave an informal pledge to call back later.
4. A casual promise made among friends or colleagues.
Their informal pledge to meet every Friday never became a rule.