Answer:

kibitzers

Answer	Crossword Clue
KIBITZERS	Fifths for bridge?
KIBITZERS	They know everything
KIBITZERS	Fifths at bridge

KIBITZERS	Buttinskies of a sort
KIBITZERS	Unwelcome advice givers

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.