There are many synonyms for the phrase "doest off the top of head". These include, but are not limited to: "recall", "remember", "recollect", "retrieve", "summon", "mind", "call up", "evoke", "bring to mind", "think of", "cast one's mind back to", "recapture", "flash back on", "hark back to", "nostalgize", "remind oneself of", "retrieve from memory", and "mentally resurrect". All of these synonyms can be used interchangeably, depending on the context of the sentence and the tone of the speaker. Overall, they are useful tools for expressing one's thoughts and memories, and can help to enhance the clarity and impact of one's writing or speech.