Answer:

slouches

Answer	Crossword Clue
SLOUCHES	Sits sloppily
SLOUCHES	Doesn't stand tall
SLOUCHES	Is in a slump?

SLOUCHES	Slumps
SLOUCHES	Stoops
SLOUCHES	Exhibits poor posture
SLOUCHES	Doesn't sit right?

Crossword

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