Answer:

stumblebum

Answer	Crossword Clue
STUMBLEBUM	Palooka
STUMBLEBUM	Inept boxer
STUMBLEBUM	Doofus

STUMBLEBUM	Lummox
STUMBLEBUM	Second-rate prizefighter

Crossword

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