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For Lack of a Better Term. Use this in parenthesis after a word that means something close to a concept/word that you mean to write but can't think of at the moment.
It can also imply humility if the 'only word you can think of' can come across as being cocky.
It is worth noting that "for lack of a better word" is basically the same, but using the word "term" is much more general and doesn't exclude anything that doesn't fit the definition of a "word". So you want to use FLBT rather than FLBW or similar.
"I need to get my stuff (FLBT) together". In this example, the word 'life' would have been a better fit than the word 'stuff', and the author knew that, but they couldn't think of the right word.