1) Busybody 2) Buttinsky 3) Crowbar user 4) Curious person 5) Inquisitive searcher 6) Nosy one 7) Nosy parker 8) Nosy Parker with a crowbar 9) Nosy person 10) Overly inquisitive one 11) Overly inquisitive person 12) Overly inquisitive type 13) Overly-inquisitive one 14) Person asking too much 15) Snoop Found on https://www.crosswordclues.com/clue/prier
Pri'er noun [ From Pry .] One who pries; one who inquires narrowly and searches, or is inquisitive. « So pragmatical a prier he is into divine secrets.» Fuller. Found on http://www.encyclo.co.uk/webster/P/160