blabbermouthed

Thesaurus

Adj.	1.	blabbermouthed - unwisely talking too much bigmouthed, blabby, talkativeindiscreet - lacking discretion; injudicious; "her behavior was indiscreet at the very best"
	2.	blabbermouthed - prone to communicate confidential informationtalebearing, tattling, leakycommunicatory, communicative - able or tending to communicate; "was a communicative person and quickly told all she knew"- W.M.Thackeray