1) Advise a chess player 2) Advise at cards 3) Butt in 4) Chat irritatingly 5) Chit-chat 6) Comment 7) Commonplace German chess term 8) Everyday German chess term 9) Familiar German chess term 10) German chess term 11) Give unsolicited advice 12) Give unwanted advice 13) Kibbitz 14) Make intrusive remarks 1) Butt in 2) Kibbitz 3) Sweat 
[English words of Yiddish origin] to offer unwanted advice, e.g. to someone playing cards; to converse idly, hence a kibbitzer, gossip (Yiddish קיבעצן kibetsn; cf. German kiebitzen, related to Kiebitz 'lapwing')
Kibitz is American slang for to give unwelcome advice.
[v] - make unwanted and intrusive comments
kibbitz verb make unwanted and intrusive comments